26 Italian worker, looking for a room in shared apartment

Hi, I am an Italian worker moving to Warsaw in January. I am a sociable and calm person, no smoker. As the nature of my job, I should travel a lot, so I will not spend more time in the room. I am looking for a room in a shared apartment quite in the city centre. My workplace is located in Mirow, so I would need a solution which enables me to reach the workplace easily by transport (max 20 mins) or by walk. I like spending time with people, also not Italians, but I prefer a solution with not more than 4 people (including me) in the apartment. Finally, I would like a double bed (or bigger than single) and a room not too small. If the solution is suitable for me, I can sign a long-term contract, for 1 or more than 1 year. I look forward to hearing from you soon, many thanks, Mario.