Room in a Shared Flat for International Student

Hello! I am Simone, 24 years Italian student actually pursuing an MSc in Finance in Lisbon. Now I am an intern in Frankfurt, but in 3 months I will move to Berlin for an exchange semester at Humboldt University. For this reason, I am looking for accommodation in Berlin where I could move in early/mid-October and stay until mid-March. Ideally, I would like to find accommodation in Kreuzberg, but every area that is about 15/20 by public transport away from Humboldt University can work out. I can assure quick payments.
I am sociable and easy-going. I like sharing apartments getting to know new people, at the same time personal space and tidiness are important variables. I have been sharing apartments since the beginning of my academic career and have never had any problems with my flatmates. I don't speak German but I speak English, Italian and Spanish. If you need any kind of documents or other information, please let me know. Best, Simone