21 year old girl looking for a room in a shared flat in Paris

I'm looking for a room as close to the centre of Paris as possible, as big as possible and as bright as possible! But I'm also interested in smaller, not so bright rooms, not so close to the centre :) I'm basically looking for a nice room in a shared flat, that is not very far from the Université Sorbonne Nouvelle - Paris 3, which is the university where I will be studying from September 2015 until January 2016 (the period of time I want to rent a room). 

I don't smoke or have any pets, and I'm a quiet person who loves to chill when she's home! Also, I love art, food, going out for walks around the city, and knowing new people from other countries. I speak Spanish and English, and a bit of Frech, which I can understand but don't speak so well (although I hope to change this during my stay in France!).