Don't worry Bassy!
Make sure to double check your class schedule and times before you start.
When you do start classes, try to get there a bit early if you can and make friends with your teachers, sit close to the front. It helps make you feel more relaxed (all throughout the year, not just when you start).
Walk around to the classrooms the day before your classes, if you have time, and keep a map with you until you know the campus! If you do get lost, don't be afraid to ask other students passing by where a classroom is. They will try to help!
You're going to do great!