The Art of Photography by Bruce Barnbaum pretty much contained everything that was in my high school photography class (aside from assignments) so I'd say that's a pretty good starting point. I think the book is more film based though, but that's fine because pretty much everything translates to digital.
This guy also shares really good info about ISO
https://youtu.be/sOdlDyolhr0?si=VC39zecWmT8Yc4d5I basically just ignored ISO (and shot at 400 or less like most film) or adjusted it not to have grain until I watched this video (and honestly I still do, but I don't shoot pictures the way he does)
