Depends on what you are looking for specifically content wise, where do your interests lie? I have been similarly excited about physics and especially astrophysics as well as learning some theory in the quantum mechanical field. My interests are mostly hardware/some software related interests in quantum computation. A focus which has helped me learn, is working with wave functions especially how they relate to synthesis (music) in both creating sound as well as analyzing it and digital signal processing, noise reduction etc. Recently have been diving into analog circuit design and development and learning to code on the digital side of audio design. If that interests you I would love to share some YouTube channels that have been helpful with basics as well as more advanced material in that realm. Check out MIT's free classes available on there as well as Georgia Tech's Electrical engineering videos, there are a number of other good schools providing free content. Dr. Leonard Susskind always has great stuff related to more advanced physics and concepts. It's hard to narrow down a focus to recommend if your learning, especially when your excited about the various subjects, but it has definitely helped me to find something analogous, like synthesis for example, to apply what your learning. I struggled with some of the calculus, still do as I'm learning it as I go, never had too much formal exposure to it even in college. May have some suggestions if your into the math, and depending on your aptitude. Definitely interested to see what everyone adds to this thread, if you want more specifics let me know and I'll provide some suggestions, just let me know what you are interested in and I'll see if I know anything that might be a good fit.

Here are some books you may find helpful on these topics:

"University Physics" by Francis Sears and Mark Zemansky "Introduction to Electrodynamics" by David J. Griffiths "Electricity and Magnetism" by Edward M. Purcell