29 yrs old Greek man needs furnished room in Berlin for 3-month (April-May-June) physics research internship!

Hello Berliners,
my name is Sotiris, I am Greek and I am 29 years old. I will be staying in Berlin for the 3-month period April 1st - June 30th.
I have studied electrical and computer engineering and currently I am completing my Master in Environmental Physics. As part of my Master’s thesis I am going to work (on a schollarship) as an intern in Helmholtz Zentrum Berlin Research Institute (in Wannsee) for the aforementioned period.
I am en easy-going, calm person and I always like to make new friends.  Other than a good carrier opportunity, I hope this 3-month visit to Berlin to be a great experience generally.

I have a degree in German language although it has been a while since I last used it. However, I can speak and understand basic German. Also my English are very fluent.
I am looking for a furnished shared apartment for not more than 370e preferably near S1 or S7 routes. I do not smoke but I don't mind if someone else does. I also don't mind if you have pets.

Hope to hearing from you!
Sotiris