Going into the summer after my high school graduation, all I could think about was college, and how I was going to prepare to go to a new school and move away from home. Just know, it is not as stressful as you prepare yourself for it to be. You don't need to worry about not having any friends or not knowing how to get to all the different buildings because you have to remember everyone else on campus has been in the exact same position you are in, and there are tons of people on campus to help you.
One of the things I was most worried about was classes and how to know which classes to take. My advice is to go to counseling and plan out your classes before you register. Planning out classes will drastically help you stay on track and the counselors will help you make a balanced schedule that you can actually handle.
Another piece of advice would be to not bring as much stuff for your dorm as you think you will need. By all means, bring the essential things that you will need, but remember a dorm room is very small and you share it with another person. You won't have a ton of space for extra stuff and you want to have space to move around and actually live in your dorm.
Finally, if you are concerned about meeting people and making friends, just try and be as outgoing and open as possible. Everyone else in the dorms is just as nervous as you are too meet people, it really helps to try to branch out. Joining clubs or greek life also helps you meet people around campus with common interests as you.
College is not something to be scared of. Even though it seems stressful and it is a big new place, it will be some of the best memories you will have for life.