I used to felt what you describe when I got into University (and I'm going forward slowly). I tried to learn all maths and solving problems, reproducing proofs

I used to felt what you describe when I got into University (and I'm going forward slowly). I tried to learn all maths and solving problems, reproducing proofs and understanding the logic behind the proof (like the construction of mathematical objects that aid in proving something, a lemma or a theorem). Only after that period of maturing my maths background I could feel comfortable enough reading books on many topics. If you don't feel comfortable you'd be wasting your time, fighting to get into the proofs. I really believe CS programs and schools should implement courses on "Thinking ,learning and building".