For an incoming grade 8 student, in the first days things could be fun, meeting with friends, meet new friends, have new classmates, new teachers.
Just be positive in the days of being a grade 8 student, it will just be pretty normal if you would just think normally and not being afraid and procrastinate on school stuffs.
Participate in the activities your school has.
socialize with everyone you meet.
Advance study in your books in that way you can able to communicate great in class on discussions.