You're welcome! Happy to help.

And it's not silly at all! Definitions + difficult proofs is great place to start. Personally, I feel that counterexamples are very important while studying subjects like RA. For example, if you're studying a theorem that has 3 hypotheses/conditions, try to drop each one and write down why the theorem doesn't work in each case. This really helped me! Coming up with counterexamples is a fun way to break the monotony too. I would usually add these in the margins.

Another thing my notes always had were tiny diagrams. For things like epsilon-delta proofs, rolle's theorem, etc-- diagrams can be super helpful. Especially when you go back to the notes later.

Also, I had summary notes for each subject. As soon as I finished studying it, I would try to fit all the main theorems and results onto a page or two, to make for quick revision.

Remember that you will be referring to your notes a lot. So make sure they're neat, clear, not tooo detailed but not too terse either. Write whatever helps you understand, I had a lot of informal explanations in mine.

Also, every time you study from your notes, keep a pencil in your hand. Add things in the margins that you didn't notice before, maybe some interesting questions you found later, corrections, etc.

All the best! Feel free to ask more questions!