what is the difference between https://reactjs.org and https://create-react-app.dev website. This websites is used for which purpose? Learning or others? and which will learn me react?
I really don't know why https://create-react-app.dev has been build but I can tell you one thing that https://reactjs.org is the official site of React. So I think you should go with https://reactjs.org and it will help you to learn to react. See the documentation there.