If you don’t have any customers, it’s hard to figure out what they want and where to start. If you start building your product too early, you risk building for the wrong customers. That’s why you need to learn more by researching your customer.
While this article is not directly related to design, the key takeaway is if you don’t know who your ideal customer is, you can’t design (build) a product that solves your customer’s pains. Always take the time to research your audience. Rob