Looking for a Room in Koln to study in University ! from 01.04.2018 to 03.08.2018

Hello I'm a French student who came to Koln for an erasmus-semester. I have to be in Koln the 1st of April and i will leave in August (I don't have the exact day of departure but it's sure that will be in the beginning of August)
I'm looking for a bed ! In a flatshare that will be good to make some friends and to have some tips for the life in Koln. My budget is 300 euros for a month, 350 euros will be acceptable but I can't afford myself more. I'm looking for a room who has furnitures. Naturally i can't bring furnitures from France because I come with a public transport. I already live in a flatshare in France also I know how it works. I speak german too but I prefer to write this text in English because it's far better than my German. And also i will study in Universität zu Köln. I hope that some WG will find my candidature and I hope that I will not sleep in the street :D
Thank you for reading me, and good luck for your research.