23 year old boy looking for accommodationTallinn

I am an engineer, who lives near San Sebastian (north of Spain). I am going to Tallinn by an intenship. Therefore, I am looking for accommodation for the start/middle of December, still I do not know the exact date. I speak spanish and english fluently and I am a friendly person. I like watching films and series, as well as practising sports like running or swimming, or just going to the gym. My internship probably will last a year.

Regarding flatmates, the truth is that I do not have much preferences. I might prefer people around my age in order to be more compatible and share more things, thus i would say the best would be people between 22 and 30 years old.