23 year old girl, physics student working on a project for a month, looking for accomodation in Mainz, close to the university

I'm a 23 year old physics student from Novi Sad (Serbia), starting to work on my master thesis. For that reason, I will be in Mainz for about a month, so I need a place to stay near university, possibly quiet. I already had experience of living with roommates, so I'm ready to share work around the place if needed. Shared bathroom and kitchen are fine, but I would need a room for myself, with good wifi.