Sebastian zoekt: Een Kamer / Studio / Appartement in Rotterdam

I am moving to Rotterdam at the end of September and am looking for a room in an apartment with a budget of ~400-600 euros (including utilities). I'm 29 years old, from the US, and starting a 1-year master's program at the Erasmus University Rotterdam. I am quiet, clean, and like to have my own space but also enjoy cooking and hanging out with housemates from time to time.