npm i npx
npx create-react-app my-app
cd my-app
npm start
<script src="https://unpkg.com/react@18/umd/react.production.min.js" crossorigin></script>
<script src="https://unpkg.com/react-dom@18/umd/react-dom.production.min.js" crossorigin></script>
<script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
create new project - npx create-react-app (yourApp name) -- npx create-react-app test
then to that folder - cd test
start the project - npm start or yarn start