Can someone walk me through how to build my first app?

General
1

I’m trying to build my first app from scratch but I’m stuck on where to start and which tools or frameworks to use. I’ve watched a few tutorials but they all skip key steps, like setting up the project structure and connecting a simple backend. I need practical, step-by-step guidance on the basic process so I don’t keep spinning my wheels and can actually get a working app built.

2

I’ll assume you want a simple mobile app and you are new. Here is a concrete path that works and does not skip setup.

Pick a stack
Use: React Native + Expo + Firebase.
Why: One codebase for iOS and Android, easy setup, huge community, free tier backend.

  1. Install tools
  1. Node.js from nodejs.org
  2. VS Code
  3. Git from git-scm.com
  4. Expo CLI
    Run:
    npm install -g expo-cli
  1. Create the project
    In a terminal:
    expo init my-first-app
    Choose “blank” template.
    cd my-first-app
    npm start

Scan the QR with Expo Go app on your phone. You should see “Open up App.js to start working on your app”.

  1. Understand project structure
    Important files:
  • App.js: entry point.
  • package.json: dependencies and scripts.
  • app.json: config for Expo.
  • /assets: images, fonts.

You build screens as components under /src.
Make folders:
/src
/src/screens
/src/components
/src/navigation
/src/services

Move App.js logic into /src and keep App.js small.

  1. Add navigation
    Install React Navigation:
    npm install @react-navigation/native
    npm install react-native-screens react-native-safe-area-context
    npm install @react-navigation/native-stack

In App.js:

import { NavigationContainer } from ‘@react-navigation/native’;
import { createNativeStackNavigator } from ‘@react-navigation/native-stack’;
import HomeScreen from ‘./src/screens/HomeScreen’;
import DetailsScreen from ‘./src/screens/DetailsScreen’;

const Stack = createNativeStackNavigator();

export default function App() {
return (

<Stack.Navigator>
<Stack.Screen name=‘Home’ component={HomeScreen} />
<Stack.Screen name=‘Details’ component={DetailsScreen} />
</Stack.Navigator>

);
}

Example HomeScreen:

import { View, Text, Button } from ‘react-native’;

export default function HomeScreen({ navigation }) {
return (

Home
<Button
title=‘Go to Details’
onPress={() => navigation.navigate(‘Details’)}
/>

);
}

  1. Connect to a backend fast
    Use Firebase for auth and data.

Create a Firebase project in the Firebase console.
Add a web app. Get config from Firebase.

Install SDK:
npm install firebase

Create src/services/firebase.js:

import { initializeApp } from ‘firebase/app’;
import { getAuth } from ‘firebase/auth’;
import { getFirestore } from ‘firebase/firestore’;

const firebaseConfig = {
apiKey: ‘YOUR_KEY’,
authDomain: ‘YOUR_DOMAIN’,
projectId: ‘YOUR_ID’,
storageBucket: ‘YOUR_BUCKET’,
messagingSenderId: ‘YOUR_SENDER’,
appId: ‘YOUR_APP_ID’,
};

const app = initializeApp(firebaseConfig);

export const auth = getAuth(app);
export const db = getFirestore(app);

  1. Build a tiny feature end to end
    Do not start with a huge idea.

Example feature: “Todo list with login”.

Steps:

  • Screen 1: Login / Register with email and password.
  • Screen 2: List of todos from Firestore.
  • Screen 3: Form to add new todo.

For auth:

import { createUserWithEmailAndPassword, signInWithEmailAndPassword } from ‘firebase/auth’;
import { auth } from ‘../services/firebase’;

async function register(email, password) {
await createUserWithEmailAndPassword(auth, email, password);
}

async function login(email, password) {
await signInWithEmailAndPassword(auth, email, password);
}

For todos:

import { collection, addDoc, getDocs } from ‘firebase/firestore’;
import { db } from ‘../services/firebase’;

async function getTodos(userId) {
const snapshot = await getDocs(collection(db, ‘users’, userId, ‘todos’));
return snapshot.docs.map(doc => ({ id: doc.id, …doc.data() }));
}

async function addTodo(userId, text) {
await addDoc(collection(db, ‘users’, userId, ‘todos’), { text });
}

  1. Version control
    In project root:
    git init
    git add .
    git commit -m ‘Initial commit’

Commit after each feature.
If you break something, you can go back.

  1. Learning pattern that works
    Cycle:
  • Pick one feature.
  • Search for that single feature, like “React Native Firebase email login Expo”.
  • Follow one current tutorial, compare with official docs.
  • Implement, then refactor into your structure.

Do not chase many frameworks at once.
For a first app, ship something ugly that logs in a user and stores one type of data.
After that, you can worry about design, tests, and fancier stuff.

3

You’re overthinking the “what stack” part and underthinking the “what problem” part.

@techchizkid gave you a solid Expo / React Native path. I’ll intentionally go in a different direction so you see there isn’t only one “correct” route.

If this is literally your first app and you feel lost at “project structure”, I’d honestly start with a web app, not mobile:

1. Pick a dead simple stack

Use:

  • Frontend: HTML + CSS + vanilla JS or React (Vite)
  • Backend: None at first, then a tiny Node/Express API if you really need it
  • Database: Skip at first, then maybe Supabase or Firebase later

Reason: Dev loop is faster. No simulators, no QR scans, no native build errors. You just hit refresh.

2. Concrete starting point

Install Node and Git like @techchizkid said, then:

npm create vite@latest my-first-app -- --template react
cd my-first-app
npm install
npm run dev

Open the URL it prints in your browser. That’s your running app.

3. Minimal project structure that won’t fry your brain

Inside src/:

  • main.jsx or main.tsx: boots the app
  • App.jsx: root component

Create folders:

  • src/pages
  • src/components
  • src/lib (for helpers / API stuff later)

Example:

src/
  App.jsx
  pages/
    HomePage.jsx
    LoginPage.jsx
  components/
    Header.jsx
    TodoItem.jsx
  lib/
    api.js

You don’t need a galaxy-brain architecture. If you’re asking “where does X go?” you’re probably over structuring for a first project.

4. Build one tiny vertical slice

Pick one user story, like:

“User can add a todo and see it appear in the list. Data can disappear on refresh, that’s fine for v1.”

Implement that entire flow with local state only:

  • A text input
  • A button
  • A list that shows the todos you’ve added

No login, no database, no styling beyond “not visually painful”.

Once that works, then replace in-memory state with a real backend.

5. When you’re ready for a backend

Here’s where I half-disagree with @techchizkid. Firebase is fine, but for a first-timer it can feel like you just imported a small religion.

Try Supabase for a more SQL-ish vibe or a tiny node server:

npm init -y
npm install express cors

server.js:

const express = require('express');
const cors = require('cors');
const app = express();

app.use(cors());
app.use(express.json());

let todos = [];

app.get('/todos', (req, res) => {
  res.json(todos);
});

app.post('/todos', (req, res) => {
  const todo = { id: Date.now(), text: req.body.text };
  todos.push(todo);
  res.status(201).json(todo);
});

app.listen(3001, () => console.log('API on 3001'));

Front-end lib/api.js:

const BASE_URL = 'http://localhost:3001';

export async function fetchTodos() {
  const res = await fetch(`${BASE_URL}/todos`);
  return res.json();
}

export async function createTodo(text) {
  const res = await fetch(`${BASE_URL}/todos`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ text }),
  });
  return res.json();
}

Then wire your React components to use those functions.

6. How to actually not get stuck

Pattern I’d follow:

  • Ignore “architecture” videos for now, they’re usually people flexing
  • Ship the ugliest, jankiest thing that:
    • Loads
    • Responds to a click
    • Persists something somewhere
  • When you hit a wall, search for that exact micro problem
    Example: react fetch api and show list

If you’re still dead set on mobile, then yeah, Expo is a solid choice and you can apply the same structure from the web approach. But getting your first feature working in the browser is usually way less painful than fighting mobile build tools out of the gate.

If you share what kind of app you’re imagining (todo, habit tracker, notes, smth else), people can help outline a step by step directory + file plan that’s not full of magic skips.

4

You’re stuck at “project structure” because you’re trying to solve 3 problems at once:

  • What to build
  • How to structure it
  • Which stack is “right”

Split those up.

@techchizkid leaned mobile / Expo. The other reply leaned web / Vite. I’m going to zoom out and focus on process, not specific tech, so you can swap stacks later without feeling lost.

1. Start with constraints, not stack

Pick:

  • Platform: “Web only” or “Mobile only” for this first app
  • Timebox: e.g. 7 days, 1 hour per day
  • Feature limit: 1 core feature, 1 supporting feature

Example:

  • Platform: Web
  • Timebox: 7 days
  • Features:
    • Core: “User can create notes and see a list of them”
    • Supporting: “User can delete a note”

Only after that do you pick tools.

My recommendation (to differ from both earlier answers):

  • Use Svelte + SvelteKit for the first app
    • Extremely small mental overhead
    • Built in routing and server routes
    • Feels closer to “plain HTML + JS” but still modern

This gives you:

  • Routing like src/routes/+page.svelte, src/routes/login/+page.svelte
  • Optional backend endpoints with +server.js

You get structure “for free” without arguing folder names.

2. Minimal SvelteKit project structure that’s not overwhelming

After npm create svelte@latest my-app, your mental model can be:

src/
  routes/
    +layout.svelte       // shared layout (header, styling)
    +page.svelte         // Home page
    notes/
      +page.svelte       // Notes UI
      +server.js         // API for notes
  lib/
    components/
      NoteItem.svelte
    store/
      notesStore.js      // optional

What goes where:

  • UI pieces for reuse → src/lib/components
  • Pages (URLs) → src/routes/**/+page.svelte
  • API / backend logic → +server.js next to the page that uses it
  • Shared logic → src/lib/store or src/lib/utils

You do not need feature folders, domain driven design, etc. Not yet.

I slightly disagree with the “skip backend initially” idea. For a lot of beginners, “where do I put code that talks to data” is the confusing bit. A tiny server route in SvelteKit keeps both front and back in one repo and forces you to see how they connect early.

3. Build a microscopic data loop

Instead of a todo app, do a notes app with tags. Why:

  • Slightly richer than todos
  • Introduces arrays, objects, maybe filtering

Flow:

  1. Text input for title, textarea for content
  2. Optional tag input (comma separated)
  3. “Add note” button
  4. List of notes below

Do this in 2 phases:

Phase A: Fully in memory

  • Use a local array in Svelte component or a simple Svelte store
  • No backend at all
  • You lose notes on refresh, that is fine

Phase B: Swap to server route

In /src/routes/notes/+server.js:

  • Handle GET to return all notes
  • Handle POST to add a note to an in memory array
  • Later, replace the in memory array with a real database

That swap is the important learning, not which DB.

4. Databases without the rabbit hole

Earlier replies mentioned Firebase and Supabase. I think both are fine, but for a “see the moving parts” experience:

  • Use SQLite first (file on disk, SQL language, trivial setup)
  • Then move to Supabase if you want managed hosting

You can integrate SQLite in SvelteKit server routes with a single file like:

src/lib/db.js

Then import it inside +server.js. This shows you:

  • Where queries live
  • How API code talks to DB
  • How UI triggers those queries

That mental model will transfer to any stack later.

5. About the mysterious product title “”

You mentioned the product title ``, which is unfortunately empty so I’ll treat it as a placeholder framework or boilerplate you might be considering.

Pros of `` (as a generic boilerplate / starter):

  • Gives you a prebuilt project structure that can reduce decision fatigue
  • Often comes with authentication, routing, and state management wired up
  • Good if your main goal is “ship something quickly” and learn by reading existing code

Cons of ``:

  • You may copy patterns without understanding them
  • Can be overwhelming if it includes a lot of tooling (linting, testing, CI, complex configs)
  • Harder to debug, because you did not set things up yourself step by step

For your first app I’d avoid heavy boilerplates like `` and instead build something tiny and explicit. Later, when you know what pieces you like, those starters become more useful.

6. Where I agree and disagree with others

  • With @techchizkid:

    • Agree: You shouldn’t obsess about “perfect stack” for app 1
    • Disagree: Going straight to mobile can slow your learning feedback loop if you are already confused by structure

  • With the Vite / React suggestion:

    • Agree: Fast dev cycle, good way to learn component thinking
    • Disagree: You still end up choosing a router, an API style, and project structure manually. SvelteKit hides some of that complexity for you.

7. A very concrete 3 day plan

Day 1

  • Install Node and Git
  • npm create svelte@latest my-first-notes
  • Run dev server
  • Edit +page.svelte to say “Hello world” and hot reload

Day 2

  • Add notes page at /notes route
  • Build in memory notes list with add / delete
  • Simple CSS only

Day 3

  • Add +server.js for /notes
  • Move add / list logic into server
  • Fetch from the UI using load functions or simple fetch calls

At the end of that, you will know:

  • How pages map to folders
  • Where UI lives vs where logic lives
  • How front and back talk

Once that is clear, you can absolutely jump to Expo, React Native, or any other stack @techchizkid likes and reimplement the same tiny notes app there. The second time will feel much less like magic.