Let your stumbling blocks become your stepping stones.
My music teacher told me this when I was about ten, I have used it throughout life.
Select the subjects you find the hardest to understand and absolutely nail them. Become the worlds worst bore on them, know them inside out. This method has two effects, firstly you know the the topics you feared inside- out and second you have the confidence to tackle everything below them, safe in the knowledge you are able to understand.
Please don't let time trickle away and just depend upon remembering question banks. Learn about the subjects concerned with flying thoroughly and with passion. That thoroughness and passion will be repaid ten fold when you may need it most - at an interview, or more importantly when aloft.
Good luck with it all.