If someone reports it, it means that your office is already very large.
You can be "legal" by running a company or registering individual businesses.
In fact, it is a side ball, because the state only has regulations on running schools, and there are no relevant regulations on training institutions. Most parts of the country do this, and you don't have any risks.
Run a school for six years and have a professional management team. You can consult if you don't understand.