Starting a new job can be tough sometimes. It's always a precarious balance between outing yourself out there, trying to be friendly and staying reserved. Because you don't want to seem like an asshole but at the same time you don't know these people so you can't really relate to them. And while it might seem like the first day of school again, it's way easier, trust me.

Like I said, if you stay too reserved, then you seem like an asshole that's better than everyone else but if you throw yourself into conversations then you'll seem weird because you don't know these people. So you just have to start slow. Usually, someone in the office will want to try and make you feel comfortable and at home. Every workplace has this character, along with many others. When this person approaches you, you smile and tell the person that you're happy to be there. Make a little chitchat but be as friendly as possible because she will be the one to tell every one else about you. Once this is done, you get back to work. Then make sure you find yourself in the common places when others are there. You don't want to seem distant so you do this. Eventually you'll hear people talking about something you know and you can chip in and make conversation with them. If you can make them laugh. Everyone loves people who can make them laugh. Do this and you'll have more friends in the office.

Lastly, always ask for help whenever you need it and sometimes even when you don't. Usually in the office you're expected to know how to do your job but it's excusable for the new guy. So ask for help with a few things and be really grateful when they're done helping you. Always remember to introduce yourself as the new guy to people when you meet them. That way they automatically try to get to know you and they'll probably be friendly when they see you next.