Once you have closed 10 customers yourself.
After 10 — you will know. You’ll not only know how to actually pitch, sell and close your product. But from that, you’ll also know when you are ready to hand that off to a full-time salesperson.
If you hire a salesperson before 10 customers. It never works. You’re looking for them to do something you haven’t proven out yourself, at all yet.
They can’t do that if you have an unsellable product.
Salespeople aren’t magicians. They are process-scalers.