The only difficult part of 8th grade is preparing for High School exams. Aside from that it is all about reaping the rewards of all the hard work you put in to get to this point. You will be working on a Year Book, on a graduation trip, on graduation itself, on a graduation trip and on leaving your mark on the school. It will be about doing your best to be a good role model for the younger grades, maybe doing cheesed to help them or help out in the community and trying to be the best graduating class of the school. Don’t worry about it.
Speak to your parents about which High School is best for you, then speak to the Guidance Counselor in your school to start working on getting the applications in order. Then get a tutor if necessary to bulk up for the exams. Don’t borrow trouble, everyone survives 8th grade with little or no effect at all. Usually it is the most fun of their lives until they get to Senior Year. Enjoy!