Distributorship. Go ahead and at least form an LLC - it will definitely be worth it. You do not register your business name with the Secretary of State.

Corporations register with the State Corporation Commission, and sole proprietorships register with their local courthouse.
I would recommend spending some time at
http://www.allbusiness.com and
http://www.entrepreneur.com going over some of the basics of running your own business. It doesn't sound like you have any experience here, which could be very costly. Knowledge can make up a large chunk of what you're missing.
Good luck with your venture!