I don't have any advice for you since I do not live in NYC. But good for you and I hope you achieve your dream. At 21, that is a big life changing decision. After 4 years of college, I moved to Atlanta, "the Southern New York" or that is what I called it at the time. From the get go, I had a lot of positive experiences, but also negative. (I had the wheels and tires stolen off of my car the first month I was there). But the negative, made me grow up quicker than I think I would have. So again, good luck on making your dream come true.