Tutes can present a really good option to make friends - just start talking to people who you're sitting next to! It can be as simple as asking them what subjects they're doing or if they're an international student you can even ask them whether they've heard about drop bears haha.
Even if they don't end up being super close friends, they're still a familiar face you can say hi to when you pass each other at uni
One bit of advice I'd give is to stick at it - it takes effort to build a friendship, so don't be disheartened if they're not your best friend after hanging out for 1 week. And because you won't see people as often as you would if you were at high school together, make the effort to hang out, even if it's just organising to study in the library together once a week or something.