What draws you to new York? Is it the idea you have in your head of NYC, or do you have concrete reasons for why you think you would like to live here? Is there job availability in your field?
I will say that working in NYC myself now and having lived in NJ my whole life, currently living just across the river, I can understand the allure. However, it can be both prohibitively expensive or frugal, depending on how you choose to live. I seek out free events, save my restaurant eating for maybe once or twice a month with friends, and live a bit farther outside the city so I can save more. I still am very there every day, and it is nice to have this city at your disposal.
However, you can also fall into the money spending trap very quickly here. There are clothing shops, shoes, concerts, and restaurants galore. The temptation is huge to spend spend spend.
Also, not to discourage you, but just to be blunt-many new yorkers do not talk to each other out on the streetd. Not sure if that is what you mean by communication, but you will not walk down the street chatting with people. Everyone always has a destination and is always in a hurry to get there. It can be hard to make friends, as I am finding out, but by going to a lot of those free events I mentioned above, I am making progress.
So to sum up my novel on living in NYC, really think hard about your reasons for moving here. Maybe come visit, and explore the real NYC, not the tourist areas. Not saying it is a bad idea-the city is a wonderful place, but it's not all sunshine and roses.