Oh, and there is nothing wrong in getting a head start on your studies/ course, etc.
Some people just like to learn only what comes from the instructor. With regret, in my last 20 years as a professional pilot, I have seen ground or flight instructors with questionable knowledge, although it is not the norm, either not knowing their material, or making up stuff that is imposiible to verify.
Perparing for a type rating and reading ahead while enable you to ask relevant questions.
Keep going.