I have been thinking what I would do even though I don't know any facts.
If no sales give away unsold spots so at least there is something.
Offer courses buy one get one free in reverse. Your course will be free if you bring someone who buys.
A promotion to business to offer group classes at an attractive price.
Do as Dave suggests.
If you could survive the work you now have hopefully some sort of income and credibility.
Free customers are in time replaced with paying customers.
The ship is afloat... refine profit, make ship shape.
Cultivate all customers as potential employees.
But cash flow needs sales or contracts and without cash flow, even a little with a small loss is sustainable short term, a hang on affair, without cash flow the money runs out, simple really.
There is a case for setting up your prime asserts such they are not in your name, could be company of family held, and your business risk is limited to the capital you invested.
Again most problems for a small business can be traced to insufficient capital.
In any event I hope things improve.
Alex