I'm certainly not an expert in Long Island real estate yet, but I've heard that getting your license is beneficial. However, not 100% necessary in gaining success. For instance, some people use the license to gain access to MLS listings, but some people would rather hire a broker to do deals for them. I am also in the same dilemma where I might want to get my license someday too. If you want to get into property management for other people, a license is a must.
I would like to get into flipping and wholesaling as well. And before doing a lot of reading and Bigger Pockets podcast listening (great stuff) I had no idea what wholesaling is either. But from my view, it's finding a real estate deal either via distressed sale, auction, foreclosure, etc. so that you can sell the property quickly. Flippers love to wholesale because they don't have to do any construction. The downfall is that you don't make as much per sale. But the stress involved seems like much less too.
I'm interested in real estate groups in Nassau County to build my network as well!