Yes it is normal to be scared and nervous. I know I was really scared. If you're scared about the social aspect (friends, etc.), don't make too much of it because the other freshman that are away from home won't know anyone else either. You'll spend time getting to know other freshman from all over the country. If you're afraid about the workload, it can be a little intimidating. You just have to remain focused. When you decide on where you're going to go to college, learn as much as you can about the campus, the town it's in, and the class requirements. You'll feel much better, the more you know.
RELAX AND ENJOY HS.