I've met loads of people like you at uni who've ended up making friends. In fact one of my best friends is really shy and self-conscious and found it hard to make friends. Now, he's one of the most popular guys I know. People just know him and like him because he's such a nice guy.
Anyway, everyone in freshers is nervous and will want to make friends just go say hi to the people in your accommodation and don't be afraid to talk to people. It's perfectly normal to go up to people and talk to them in freshers cause everyone just wants to meet people. So don't be afraid to say hello!