Use the terms "Artist-Blacksmith and Bladesmith".
A hobbyist usually does not need insurance, but it is best to check with your homeowners insurance agent. If you sell ANY knives, they will not call you a hobbyist. Trust me, they will check and see if you sell knives.
Start with your homeowners agent and ask what insurance you may need if you have a small blacksmith forge at the house. If you don't get a good response, check with a commercial agent.
One thing that may be required is a fire inspection by the Fire marshal. This will require that all propane be properly stored, and all fire, forge, and propane be outside the residence building. If you work in your garage, it will not go well.
The best method to deal with all this is to form a business, pay for licenses and taxes, have a detached building for the shop, and get business insurance.