Also check that the county or city that you live in does not have a separate business license fee. I live in San Mateo which does have that requirement, so YMM

Also check that the county or city that you live in does not have a separate business license fee. I live in San Mateo which does have that requirement, so YMMV. If you are not concerned about unlimited liability, you can consider a sole proprietorship else LLC is probably the way to go. As always, I'm not a lawyer and merely speaking from my experience.