Looking for accomodation in Tarragona

Hi, I'm a italian student from Florence, I'll be in Tarragona in september for an exchange semester. I'm looking for an accomodation in the city center but I won't be able to come to Tarragona until the end of August. I'm not a smoker and I've lived before in shared flats so I know how to behave. I'd prefer not-italian flatmates because I want to learn the language. Let me know!