looking for WG room in Hamburg

Hello! My name is Andrey, I have come from Russia to research in Chemistry. Now I am in my 2-nd year of PhD in Chemistry Department of Uni Hamburg. I have a contract until summer 2021 which would be very possibly extended for one more year. Since now living in Schenefeld it's a pretty long way for me to get to work. That's why I am looking for better-located accommodation. An only important requirement for me is the possibility to reach Sternschnze or Schlump stations within max 30 min by public transport.
I am pretty focused on my job and spend pretty much time in the lab. In my leisure time I like to do sports (gym, rock climbing), meet with my friends in the city, travel across Germany.