You might start with looking at the website of the American Massage Therapy Association at www.amtamassage.org. In some states, including New York, they have to be licensed by the state. Even once you get past the credentials, you'll find that you may enjoy one person's style or manner more than anothers, so it may take some time to find the right one. Ask other people you know to get some recommendations.

As for what type of massage, that's harder to answer. What are you hoping to get out of it? Relaxation, relief from injury, strain or overuse, more energy? You can look up different types of massage on the Web. I personally enjoy deep tissue and Thai, but I have to admit that I haven't tried all the types that are available.