Yes, licensing is normally required, as well as a clean criminal background. Some states require a certain amount of time in the industry and a certain amount of training to get licensed.
Most Net Branches require specific mortgage experience to be affiliated with them. Note that this is a business that looks easy on the surface, but in reality 90% of everyone starting leaves in a year or less. It is a tough business, and you have to go out and find your business, not wait for a buyer to come to you.
If you have never done this business before, I would advise working for a knowledgeable person first to learn some of the ropes, then go out on your own. Mortgage lending is different from every other type of lending, to not, most banker types never understand mortgage people. It is really a totally different animal than car lending, though some of the lending basics are very similar.