24 year old guy looking for accomodation in central Zagreb

My name is Michael (most people call me MIke) and I'm a graduate from Salzburg Education College (Special Needs Education). I'm doing an internship in Zagreb as a German language assistant in different schools. 

I'm an opend minded guy, always interested in meeting new people and getting to know new places. I speak German, Englisch, a little bit of French and a little bit of Croatian (defenitely want to improve my Croatian during my stay in Zagreb). Things i like to do in my spare time are Sports (Basketball, Football, Tennis, etc.), listening to Music and hanging out with intersting people.

I'm looking for a room in a shared flat, centrally located in Zagreb (not more than 400€). Important for me is a reasonably clean flat with nice and open minded flatmates where i can work in privacy if I need to. I'm a sociable guy, so i don't have problems with roommates bringing friends or having parties from time to time (just maybe not every day).