yarn create react app

npx create-react-app my-app
cd my-app
npm start

// Go into the folder where you wish to create your app
yarn create react-app appname

npx create-react-app my-app --use-npm

npx create-react-app app-name
cd app-name
npm start

npx create-react-app project-name

npx create-react-app my-app
cd my-app
yarn start

yarn create react-app my-appCopied

yarn create react-app my-app

to override yarn
npx create-react-app my-app --use-npm