Heya!
Okay, your first op to make friends is O-week. Talk to everyone, talk to people while you line up for sausage sizzles, talk to mentors, talk to librarians. It might be awkward at first, but then you start to get the flow of it. Just smile a bit, be open.

There's so many people that even if you end up making a fool of yourself, no one will remember.
Oh, go to uni events if you can, join clubs that have meetings on the days that you will be at uni.
It's kind of hard and it's not in different respects. It's hard in that you need to take initiative most of the time, unlike highschool theres not synchronised times for lunch or anything else, it doesn't really force people together in the same way. I've met plenty of people but hardly any of them became friends, its because you meet a *huge* amount of people but to keep it up you do need to make some kind of effort.
^ tottttaaaaallly agreed with kp, uni can be lonely at first because you don't see the same people every day. Some days you walk in and you see everyone you've made friends with. Some days you walk in and there's no one you know.

But if you can train yourself to take initiative during o-week, you will have a few people to linger around, and when you're already with a person or two, it's always easy to pick up more people who are standing by themselves. Most people will be happy to be adopted into a little friendship posse for the day! During the first few weeks at least....