Searching for a sublet in New York

Hi,
my name is Max and I am 22 years old. I am a German student, currently studying Law in France. For one semester during my Master's degree, I will come to study at Columbia Law School in New York this year and therefore I am searching for affordable housing in the city. I do not have any preferred parts of the town, but I would like to find housing within commuting distance to Columbia in Harlem.
I am a responsible person and since I finished school, I have been living abroad mostly, in Argentine and France. In my free time, I like to go for a run, read or cook. I speak several languages (German, French, English, Spanish, Portuguese), so if you are a multilingual shared flat, I think I would fit in quite well.
Please hit me up if you know anything, it would help a lot!