Uni is what you make it.
Some people find it hard to make friends, some don't. Some people a re good with money, others aren't. Some people have no self-control when it comes to their alcohol limit, others know when to stop.
They'll be all sort of people you'll meet at uni. Some you like, dislike, some you'll share a common ground, others you'll have zero things to talk about.
And halls is way bitchier than secondary school and sixth form.
Other than that, you enjoy it, stand up for yourself when you need it.
Gain confidence in the following: learning to be assertive when need be, how to cook properly, social and talking to new people, learn humility (how to laugh at yourself and not be up-tight), be less ignorant and understand people have not come from the same background as you.
Enjoy uni. Uni will have it's ups and downs, challenges and obstacles. But, above all, you need to have as much fun as possible before entering the world of (proper) adulthood!