To begin:
npx create-react-app my-app
cd my-app
npm start

Delete all default mark up.

For components create folder #components in #src folder and place there your react components. In my project you can see: Form.jsx, FormInput.jsx, List.jsx. You can create as many components as you want and name it how you like.

In this project Material-UI is used. To install run:
npm install @material-ui/core

Material-UI was developed based on the Roboto font. The Roboto font will not be automatically loaded into Material-UI. So be sure to install it.

To install run:
npm install fontsource-roboto

Then import it in "index.js". To do so write in "index.js":
import 'fontsource-roboto';

To use icons run:
npm install @material-ui/icons

Button example:

import React from 'react'; import Button from "@material-ui/core/Button"; // custom styles with Material UI const useStyles = makeStyles({ root: { background: 'linear-gradient(45deg, gray 30%, black 90%)', border: 0, color: 'white', height: 30, padding: '0 10px', whiteSpace: 'nowrap', margin: '15px 0 0 20px', } }); const Button = () => { const classes = useStyles(); return ( <Button type="submit" alt="add-note" className={classes.root} > Add task </Button> ) export default Button; 

Then you can see the result - button "ADD TASK" look like:

That was easy, right :)