If you do exactly what they ask of you, and stay focus, instead of trying to bang every F/A in training, you should not have any problems.

It was my first time, and I didn't have any problems...ofcourse that's a testament to the quality of the training, but honestly, study your @ss off, pay attention in class, go to bed early, be humble in the sim, and you will not any have any problems I promise you.