I'm gonna give you the same advice I gave the other kid. Good luck with this unique program, I have no real advice there.
I know everyone is basically saying to chill, which you should, but I will say, from a study strategy standpoint-
For classes where you have to remember things (words, numbers, etc). I'm talking biology, history, psychology, etc. Use Anki. Or some form of spaced repetition.
For classes where you have to problem solve (math, science, physics), you need to do a TON of practice problems. Like just beat your head (metaphorically) against a whiteboard.
Some classes (chemistry, organic chemistry) require both memorization AND problem solving.
Also, when I was your age I used to run around saying "Sleep is for the weak and the dead!" that was incredibly foolish of me. You need 7-8 hours of sleep a night, basically every night. Going on a sleep deprivation stretch in high school and college has probably permanently hampered my cognitive performance a little. Maybe. But anyways, I'm just saying go to bed dude. No all nighters. Study in advance of the test. No cramming.