Young male student wanting to move to Berlin

Hello there Berlin expats, I'm a 19 year old Norwegian guy looking to move to Berlin to study next summer. This will be a Bachelor study in English for three years at an institution in Schöneberg. I speak very good English and relatively advanced german, enough to follow most German TV shows etc. and to go through life in Germany without a problem.

The three main reasons why i want to move to Berlin is its status as a major European city, its liberal attitudes and cheap rents in central areas. As a young guy who loves to party at nightclubs, I think Prenzlauer Berg, Friedrichshain and Kreuzberg seem the best places to live for me, eben though it would mean a long commute to U-Bahn station Bayerisches Platz.

I especially like the area between Eberswalder Strasse and Schönhauser Allee U-Bahn stations in Prenzlauer Berg. If I'm not mistaken this is a central shopping district with many nightclubs and young residents, which sounds good. However, I'm afraid that most of those students study at Humboldt or Freie Universität... Some sources claim that southern PB (around Ebersw. Str. U-Bahn) is mainly populated by expats, politicians etc., while the are around Schönh. Allee is more "ghetto". Is this true?

I would prefer to live in an international area with as few etnhnic conflicts as possible, also the area should be populated mostly by whites (Germans and expats(. I have lived in a 95% non-white area before and it really wasn't my cup of ea, I guess this rules out parts of Kreuzberg and Friedrichshain since these areas have large Muslim populations?

My max budget is 700 Euro Warmmiete per month, I've looked at several sites and with this budget I can get a nice apartment which is more than big enough for one person, in a central area. However it's important to make friends in a new city, living in a WG is cheaper and can make me more friends but I suspect it's more difficult to maintain privacy when it's needed. Is it generally accepted in WGs to take other friends there, family sometimes, girls from a nightclubs etc.? Do you recommend living in a WG or by myself? Of course I don't want to get lonely but I also want privacy sometimes.

I understand that this is a lot of tect and questions but I'm really in a hurry right now, I'm thankful in advance to those who help me by answering some questions.