Cap N.
1st - On rosters A320, nothing you can do about it, alot has been written about it.
2nd - On trainers and training a lot has also been written about it, on the other hand if you are prepared for your session, you wont have any problems. Don't show attitude towards the instructor, if anything out of line happens, calm down and take it easy. If he is wrong give him a refference and show him you know.
3rd - If you don't know where to find the right information, you'll have a hard time here. You don't need to memorize everything, but go through the books, all of them and familiarize yourself with them.