As the man said.
Types- well, if you are in the business of buying and selling guns, that is an 01 DEALER. For personal use, but NOT in the business, an 03- Collector of Curio and Relic Arms (generally 50 yr or older guns) Other types are manufacturer, importer, maker of ammo, etc.
If you do not intend to engage in the business, and do not have a business license, location zoned for business, etc etc etc, the ATF will NOT issue you a Dealer's license.
What we have here is... failure- to communicate.