22 year old girl, looking for accommodation in Rotterdam (January-May or June)

I am a student at the University of Economics in Prague - Czech Republic. I study the Faculty of Management located in Jindřichuv Hradec, CR. I am coming to Rotterdam due to my erasmus exchange program to study at Rotterdam School of Management. I am a master student so i am coming in the middle of January and leaving at the end of May or June. I prefer living in a private bedroom but i like meeting new people and making new friends. I would like to live near RSM or in the center of the city, but i also would like me room to cost max 400 euros a month.