There’s many, many books out there on the science of learning. These are my favorites.
Make It Stick is written by psychologists that study memory. It’s a fantastic eye-opening book dense with studies, evidence, and surprises. Read it.
Ultralearning and Deep Work are written by a couple of people that really nerd out on trying to learn and they have a sincere love for the subject. Refreshingly, they’re not the usual motivational coachy types that write on these topics. Instead, they have a sincere love for the subject and share their experiences with you.
You could go out and read the many many other books on learning out there, but I think that these would give you more than you need to greatly accelearate and improve your learning.