As someone who recently moved to New York City I have got to say you are in for the time of your life... Nonstop action! It took me a couple of months to find my niche here but I don't regret the move for a minute. You'll be just fine. Suprisingly enough, the people here are a lot more friendly that I thought they would be.
PM me when you get in town and get settled so we can take advantage of my expense account and grab a bite to eat somewhere.