[lokiju]

Since you want to quickly revise topics in a new complicated subject, I'd suggest simply slowing down and writing really thoughtful notes on the subject. Use elements of recall to really get a picture of where your understanding is at, itll help you build the lattice of your knowledge and that lattice will be strengthened when you review your notes.

I dont think cheatsheets are helpful personally. Unless you are just talking about syntax.

Also specific methods might be worth a look down the line, but initially I dont think it makes sense.