looking for a room in munich, 22 year old guy

i come from lecco, Italy. the city is 50 km north milan.

i'm having an erasmus exchange next semester (from april until september 2016) in Munich, Germany.

i'm looking for a room where to stay these months.

I would prefer to find a city center shared flat, with girls or boys, no differences.

I am 22 years old and I like to have fun and meet new people, but i study a lot, too.

I'm a master student in physics, and i'm going to study at TUM in Garching.

30-50 minutes travelling to get to Garching is ok for me.