Italienischer Doktorand sucht WG-Zimmer von Mai bis Juli

Deutsch
Hallo, ich heiße Stefano und bin ein 27-jähriger italienischer Doktorand in Luft- und Raumfahrttechnik. Ich werde von Mitte Mai bis Ende Juli im DLR Köln arbeiten und suche eine WG-Zimmer.
Ich spreche kein gutes Deutsch, deshalb schreibe ich mehr Details in Englisch.
Entschuldigen Sie!

English
Hi, my name is Stefano and I am a 27-year-old Italian PhD Student in Aerospace Engineering. I will spend a research period in DLR in Cologne from mid May to the end of July, so I am looking for an accommodation. Move-in and move-out dates can be slightly different, if needed!
I speak English, Italian, Spanish and I am trying to learn some German.
I will need to go daily to DLR, which is located close to the Cologne-Bonn airport, so a good connection with it would be excellent. It would also be good to reach the center by bike. Moreover, I would like to find a place from which it is not too difficult to reach the center of Cologne by public transport.
I will be home mostly at evening during the week and will often need to cook something for dinner.
I am friendly and will appreciate spending evenings talking with roommates or going out for a beer and/or a walk in Troisdorf or in Cologne (better in the weekends!). I love learning languages, so it would be great for me to improve my German talking to you!
I like reading, sports (basketball, football, swimming, cycling, I also used to do parkour), music (I play guitar), art and photography. I also love travelling, so I will certainly explore the city of Cologne during my stay!
I will bring just my clothes, books and personal computer, so I will need at least a partly furnished room.
A flat internet connection would be necessary for me, for both work and personal communication!

A rent price between 400 and 500 € would be the best, but I might afford even a slightly higher cost (definitely no more than 700€!).

Please ask any additional details you may require from me, I would be glad to answer.
Thank you very much for your time!
Vielen Dank!

Cheers/Tschüss,
Stefano