18 year old girl, future student in the University of Saarland

I am Anna, an 18-year-old girl. I will study in Saarbrücken for two years. I'd prefer a room in a university dormitory. However, an apartment near the university is also fine as long as it won't cost me more than 450€ a month.  I could also rent a bedroom in a shared apartment, or join a group of people who are looking for a female roommate.