Learning physics on your own can be daunting. Even though there is an abundance of learning materials available, it can be really difficult, especially for beginners, to structure them in a meaningful way. Fortunately, I stumbled across this exceptional guide. It contains anything you need to know of undergraduate and graduate level physics.
https://www.susanjfowler.com/blog/2016/8/13/so-you-want-to-learn-physics