1. Check your ego at the door. If you behave like a skygod then you will have trouble.
2. The training is more emotionally fatiguing than than work or study. It's 4 months away from your family. It can get lonely
3. Don't ask too many questions. You've already demonstrated you're a captain. To ask questions suggest doubt. They don't like that.
4. Even after you're assigned a groundschool, even after you've passed your Airlaw, Molit skills test, ATP ride, you can still cock-up training and go home. Act like a cadet until you pass your final line check
5. Positive attitude is everything. It can overcome small errors here.
6. Don't lose your cool. Lots of minor inconveniences here.... To blow your top shows immaturity and lack of self-control. It is the polar opposite of the middle east.
I'm sure others can elaborate but this is just my thoughts. Good luck