Then you analyze feedback and redo your prototype with what your customers need? The key thing is understand the underlying desire. Ford is famous for saying

Then you analyze feedback and redo your prototype with what your customers need? The key thing is understand the underlying desire. Ford is famous for saying that if he asked people, they would tell him they wanted a faster horse. He understood they wanted a quicker means of transportation, so he built a car. That's what you do with the feedback of the prototype. Listen to responses, and adjust or abandon. As for experience? Not directly, but seriously, this isn't hard. This is literally the standard way every successful businesses operate. They analyze market demand, built an answer, get feedback, and adjust. Only very rarely does an individual's personal itch ever become a successful product.