I am not familiar with the Boston area, but if I were you I would look into finding free resources for starting a web based business. There is really no need to pay for a class when the information you are looking for is readily available. I know for a fact that your local library will have a ton of books on start-ups. If you are really dedicated I would pick up a book on financing a new business as well and go from there.
You could always ask around the web, and see how other web based business got started. From my experience talking with online entrepreneurs, most of them are more than willing to give you advice or direction.