Probably not what you want to hear but, the next step is that you continue iterating to test to see if you can get traction.

If you can’t convince people to use the product it might mean that it is not something people want. Try treating your product like a science experiment. Your idea and execution is a hypothesis for what you think people want.

If you’re an engineer then the above doesn’t cost any money and hence doesn’t require investors. If not you have to get good at convincing people to work with you.