I've had roommates before. I just finished my freshman year of college, and I've done programs before over the summer where you live with other people. Overall my experiences with them were good. There were a few minor things that caused some problems, but nothing too serious.
First off, try to be friends with your roommate. It can be kind of awkward if you two don't talk. It's not really hard for two roommates to get along. You can start off with icebreakers such as mutual interests, learning about each other's background, etc. Just be chill and things should turn out fine.
Make sure you let your roommate know if he/she is doing something that irritates you. Tell them when certain behavior has to stop, but don't be hostile about it. The problem will never get fixed if you don't say anything. You can blame your roommate for their actions, but at the same time you have to also blame yourself for not trying to fix the problem.
I think roommate courtesy is pretty important. If your roommate is sleeping, don't make a lot of noise. If he/she is doing homework, don't blast your music. Just stuff like that. Hopefully the roommate you get will return the favor.
I hope that your roommate turns out to be a cool person who you will get along with! Maybe you can post here again when you meet him/her and let us know how he/she is!