21 year old girl, history student, looking for an accomodation in Lisbon

i'm Federica,  a 21 y/o girl, currently studying history in Bologna, Italy, and I'm looking for a single room for the first semester (1st Sep-31th Jan) in Lisbon, possibly in the centre. I've been living for 2 years in a shared appartment with other 3 flatmates, so I would say that I have experience and I'm used to it. I would like to live with my future flatmates in a friendly, chilled and shared atmosphere, because I think it's very important having a good relationship with people in the house. I'm friendly, openminded, creative, clean, respectful and I like to meet new people. I'll be in Lisbon for my first Erasmus and it would be great to stay with students who's living my same experience. i speak Italian, English, I understand Spanish and soon I'll start a course language of Portuguese.