How do I become a legitimate travel agent?

Miss Tee asked:

Has anyone ever been a travel agent or known a travel agent that made alot of money or that owned any kind of travel business and was successful? I would like to know what kind of license I need in order to be a legitimate travel agent. I am based in New York. Is there are school I need to go to or training online. What company should I affiliate myself with? Any travel agents, please give me the low down. Thanks.