make mistakes your first year. Maybe experiment with drinking (i know you don't drink but now is the time to try it at least). first year is essentially about smurfing up and learning how to do uni. with your academic ability you will do fine, so concentrate on the social side. make friends and stuff, your uni may not offer halls after first year, and you're going to want to know good people you want to live with afterwards.

Finally, pay attention to your course. is it what you want to do? Is it something you're passionate about? You may find your mind changes a few months in. this happened to me. I was doing something I only mildly enjoyed, so I swapped courses. Now I do something completely different, which I absolutely love. Changing your course is something that might happen, and it is very easy and pain-free. Do not under any circumstances stay with a course you dislike.