Looking for a room for 5 months

Hello! My name is Silvia. I am a PhD student and I will be staying in Flensburg for 6 months from the beginning of January 'till the end of June for a fellowship.
I am 30 years old and I am from Torino (Italy) but in the last few years I have been living mostly abroad (Brussels and Sarajevo).
In Flensburg I am looking for a room in a cozy flat where I can relax after work but at the same time where I can get to know new people and Flensburg life. I usually like to spend time with my flatmates and I especially like to cook and organise dinners, but I also like to have my private space from time to time.
The flat possibly should be close to the city centre and shared by people around my age (25-35).
Since I am not in Flensburg now I cannot come to visit directly the flats but I would be happy to arrange skype meetings.