I was in a single sex floor at my Halls in the first year of my degree. The kitchen was the big social centre.
You'll find people in your Hall
with a range of social skills, from fairly good to non-existent. Treat the people with better social skills as role models. And gently try to engage and encourage the people with not-so-good social skills, by breaking the ice with them and talking with them in positive, enthusiastic, light-hearted ways.
For getting on with people there's a large element of going with the flow. For example in my kitchen, due to the general levels of slobbery, I got into the habit of washing my pots, dishes and cutlery before cooking instead of after eating. Because if I washed up after eating, someone else would borrow my pan and leave it dirty.
You will naturally form closer bonds with some people in your Hall than others. That's fine, but you should still aim to remain friendly and positive towards everyone, even if you have nothing in common with them.
You might want to check out non-ensuite halls, if it's not too late. They're cheaper and sharing showers and toilets is no big deal.
Use every opportunity you can to break the ice with other people. Before and after lectures with course-mates. The people sitting at the nearest table to you at the campus canteen. People playing pool near you at the pool hall. People out drinking at the same student pub or the Union. People walking near you on campus. Society events.
Relax and don't be outcome dependent when you break the ice. Just enjoy the process.
You'll find a lot of students are cliquey. Especially after the first week / month.
You don't have to have self-imposed barriers on you breaking the ice. You can treat your social life as one big enjoyable game.
There's a few youtube channels devoted to social skills. Some of which are good and worth watching. And there's a few books on social skills that are worth reading.
And as a bonus tip, going to uni with competent food shopping and cooking skills is good. Give yourself an intensive crash course in this area over the next 5 weeks. It's partially about your self-image that you're no longer a kid and partially about your image to others.
And budget your money properly. You'll have so much you can spend per week. This will involve some discipline on where you spend your money. Don't become one of those students that's always complaining or joking at how skint you are.