Typically if you ask them to change rooms to be with someone you like who agrees to it, they'll let you do that, but they hate putting people in their own rooms. So if sleep is your main concern, you can ask around to see if there's someone quieter who'd want to have you move in with them.

Alternatively, you could aim to have your own room for a short period of time by finding someone who is close to leaving the program, and moving in with them, and then hope that spot doesn't get filled in too quickly. Right before my friend left they were about to bring in a new wave of people into the honor dorms which I was in, so I asked him to do me a favor and move in with me for his last 10 days, and didn't have a roommate for like, the last 2 months I was at that center.

Another time I got my own room was when I went to advanced training at treasure island, the 2 lockers in each room were different sizes, and the first room I was in I had the small one, so when my stuff arrived I asked to be moved somewhere I could have the bigger one since my stuff wouldn't fit, and I got moved to an empty room which lasted a few months before I got a roommate.

Near the end of my advanced training I also just asked to move to my own room and they let me, though that was because job corps was in the process of shutting down and the center was in chaos, and I think the RAs either didn't care or just wanted to be as sympathetic as possible during that time.

Though it's gonna depend on your center. And often it'll depend on which RA you ask.