Make conversation. This is the biggest bit of advice you have. On my first day my whole flat were sitting in our kitchen, and nobody said anything apart from me, but it made it so much easier as i made friends faster with everyone in my flat then those who said nothing
Secondly be confident. Fake it if you have to but not looking worried in public is a huge way to make it easier to get along with people ( you can be how you like in your room)
Thirdly if your in a block of flats or in small flat surrounded by other small flats, go out and talk to random people, go to where the music is playing and people are having fun and make new friends. The reason being that the friends you make in the first 2 weeks are usually the main group of friends you will have and do most things with. Fair enough you might make better friends on your course but its harder as you cant talk in lectures and you spend less time with them. So dont go to uni expecting to make loads of friends on your course, rather to make as many friends as you can. Even if you dont think you want to hang with that 'certain person/flat' being friends is allways a bonus as you get invited and can go to partys and make more friends!
For me the outcome is that im friends with my whole flat, but i get along better with some of them then others and even then spend most of my free time at other friends flats. But if there is ever a party then i know so many people i can invite loads or just turn up and its fine and its allways a laugh even if your not the greatest of friends. Also the party thing works if you invite someone you kind of know and they bring their friends then you get to know more people
But just dont waste the freshers week. Its the one week you can get to know people without it being awkward as everyone is still getting to know everyone else. Because of this dont waste your time with just a few certain people. You have the whole year to become better friends with them (especially if they are flatmates) so go and meet as many as you can. however meeting people randomly who you dont know, well its alot harder imo!
Also dont lie about stuff, and dont brag those are the two things that people will pick up on choose not to talk to you, just be yourself!
oh and one way to get friends quickly with girls is just to make really random assumptioms (like say how they look like a geologist - or some other random course - or how they are really quiet -when they are stupidly loud) as you dont know them and they allways find it funny just for it being so random - just dont interview them (or anyone tbh) on 'what they do' as conversation ends really quickly if you just say bland who,what,when,where,why questions - be interesting!. oh and the reason you should do this is as ive found that with girls they introuduce you to more people then guys, making it easier to make more friends