1. You don't have to worry about anything, mainly because no one has found you. Anyway, it's only been a month. It can be said that it's a private tutor, not a training class. Because the training class needs to take pictures.
2. If you want to reassure yourself, you can apply for a license of a studio, and the business scope is information consultation. You can't get a business license for a house, so if you want, search for "registered company" on the Internet and ask them to provide you with a registered place. The price is around 500 yuan.
If you hold a training course in a commercial office building or business district:
1. Call the school and pay some phone bills. Anyway, it only takes a month.
2. handle a personal studio, or a limited company (the price is relatively high)
Good luck ~