25 and 28 year old german students looking for accomodation in Rome starting mid September/beginning of October

Hello dear community, a friend of mine (28) and I (25) are going to do a semester abroad at the Faculty of Political Science at Roma Tre University. So we are both looking for a private room. Either two private rooms in a larger shared apartment or each alone in a shared apartment. We would prefer a flat near the Faculty of Political Science, i.e. in Ostiense or nearby. The cheaper the better, of course, but the absolute maximum would be 600 euros per person. We are both currently studying for our Masters in Political Science in Bonn, Germany. Besides German and English, I speak Spanish and some Italian and my friend speaks some Russian. The period would be from the 1. of October to the end of December/January. Thank you very much