How to teach yourself hard things
If your are interested in learning hard subjects, I highly recommend Richard Hamming's wonderful course The Art of Doing Science and Engineering: Learning to Learn [1], and the related book [2][1] https://www.youtube.com/watch?v=AD4b-52jtos&list=PL2FF649D0C...[2] https://www.amazon.com/Art-Doing-Science-Engineering-Learnin...