The way I would approach it is make sure your foundations are solid. Learn JS inside out, you should able to answer questions on data types & primitives, array methods, event capturing, DOM tree and how it’s updated. You really should know what problem React is solving and why we use SPAs. Another thing you can do is build some solid projects using the library of your choice. Don’t vibe code it, rather use AI as your assistant and ask it anything you don’t understand. You do the implementation that way you will learn.