Join a Facebook group of your uni halls in you can find one.
Go to loads of flat parties during freshers and get steaming so you can make loads of new pals!
If you want a job try and get one thats 16 hours a week MAX because any more than that and you'll have like no time to do your actual work/study and also have a life.
That's just off the top of my head, if I think of anything else I'll post more here