It's funny, each section of training is somewhat stressful (especially for those who are new to 121 training, i.e. me) but once you complete each test and look back, it really doesn't seem that bad. the first week is indoc, followed by a 75 Q written test, open book... After that, it differs by fleet, but for me in the ERJ we had 3 1/2 weeks of ground school where we covered a system a day and finished with performance, then another 75 Q test over systems. Then you will complete CSI (2 days)which is sort of like oral prep. the oral that wknd (2hrs) and then sim starts monday. Once I got to sim, I felt like it had flown by, but each long day of ground school seemed monotonous and never ending. Just find some guys and gals that you can hang around after class with and blow some steam off.
Advice would be to not dive deep into your oral prep, know what your instructors tell you to and leave it at that. There will be time later to learn every detail you want, but keep it simple for now. Also pair up with a senior person in class (preferably a CA), unless you yourself are pretty senior. It will help you when picking sim location and time. Hope this is what youre looking for.. Good luck and congrats