20 year old female student looking for summer housing in Hamburg

Hello! I'm an American student working in Hamburg for the summer. I have found that my current accommodations can't sign the proof of residence document, so I need a new apartment for the second half of the summer. I would be staying from July 16 until August 20, but would of course pay full rent for both months. And I need someone who's willing to soon a proof of residence (it shouldn't require any other work on your part so long as you are registered in Hamburg).

I'm a fairly quiet person; I tend not to be loud or stay out late. I have no pets and don't smoke. That said, I'd like to room with someone I could be friends with, since I don't have any here yet.

I'm a student at the Massachusetts Institute of Technology, studying physics and German,and I have a summer internship in Hamburg.

I'm looking for somewhere nearish the main city, preferably with a kitchen I could use and away from loud traffic.