Czech student looking for a separate room and flatmates in Porto

Hi, in September I am coming to Porto to study law at the UCP. I am looking for a separate room in a flat close to the city center, preferably in the Boavista district. Of course I'd to know my future flatmates in advance, so I am also looking for other students (can be also locals as I want to learn Portugese) to find a place to live together. I don't have any specific requirements for the flatmates, I am an easy-going and social person who likes to have fun, but also I prefer to keep the place I live in clean and rather calm. But don't worry, I like to party a bit too .-)