Dutch exchange student looking for a furnished room

My name is Lars and I am a 21 years old student from the Netherlands and I am currently following the Erasmus Exchange programme here in Berlin. I am currently living in a temporary room in Friedrichshain which I have to leave at April 27. Therefor I am looking for a new room for the rest of my stay (until mid August), or a part of it. I am passionate about snowboarding, surfing and other "board related" sports. Next to this I used to play football on a relatively high level. I also like to cook and experience different cultures. During my stay here I will spend time on my study but next to this I want to explore and experience as much as I can of the city.

Since I only have a bag full of clothes with me I am looking for a FURNISHED room.
For the rest I do not have a lot of requirements. Preferably I am looking for a room from the 25th of April, but from the 1st of may is also possible. I can manage three days in a hostel. Since I have to leave my current room in three weeks and I am not from Berlin, I am kind of desperate to find something. If you have any tips regarding a room you can always send me a message!

I am looking forward to your emails!