You will have to let the world know about your product. The easiest and cheapest way to do that is to let your customers do it for you. They will if you delight them and solve their problem.
If your prototype is drawing a mediocre response, find out why. People don’t rave about so-so. You could release anyway but convincing people to buy mediocre takes a boat load of cash.
Delighted customers create community. People like to join communities.