Where should i being as a complete beginner?

Im a complete beginner when it comes to drawing and digital art. I want to start drawing and learn the fundamentals. I've already been working as a video editor, videographer, and photographer for more than 2 years, so i have good knowledge about lighting, compositions, and stuff. What interests me are the human body and poses... for example spider man, jujutsu kaisen, JOJO etc. And animals and insects.

I would really appreciate some YT tutorials, lessons or any short courses i can pick up online. I also love reading books so please do recommend books about art/color theory