Kreuzberg, Friedrichshain, Neukoelln

Hello,
my name is Sanja and I'm from Croatia, moving to Berlin to work and live there. I don't speak German (definitely planning on learning it), but my English is fluent. I'm 22, friendly and outgoing, open-minded (and normally not nearly as formal as this post sounds to some :P), but quiet when I'm in my room . Since it's my first time coming to Berlin, I don't have the Anmeldung, so I'm looking for a room with which I could also get that (Please don't send offers if I can't get an Anmeldung). Not looking for anything luxurious or fancy, just a cozy place and nice and friendly roomates. I finished music high school (piano and opera singing), but haven't continued my schooling because I've had some problems with my vocal chords, so I decided to take a few years for myself. I've worked as a piano teacher for a year and a half, but decided to move out and see what's it like living and working outside Croatia. I'm already in Berlin, so if you're interested in my add, we can arrange a meeting.
P.S. Please no offers from people who don't let roomates smoke on the balcony. I don't normally smoke, but not letting a person smoke outside tells me enough about you as a person.