I am a student who is looking for accommodation in lisboa

Hello, my name is Vincenzo Carrabetta, i am 21 years old and i am from Italy, i study medicine and radiology techniques in Catanzaro, Calabria. I am an Erasmus student. I will be there in Lisbon for 4 months, and i am looking for a flat to share with some other students , preferibly foreign students. I will study in Estesl Lisboa, so i'd prefer an apartment in central Lisbon, red /green metro line. I'd like to find a single room with a window and heating. My budget is 300/320€ bills included.