I know what you mean about not enough details in answers, during my first year that happened to me to. Now I use as much detail as possible, even something that is simple and seems lime common sense, I don't take any chances.
It's amazing how much stress you can save by not stressing about what you can't change. As you said, once you hand in a test, there is no need worrying about. I just take note of what I didn't know and begin to study it more for the next exam.
Keep up at it, I'm sure you already know that determination and perseverance are the biggest factors.
Now I have to get going soon too, class from 7-10 tonight.
