Think about it from a different perspective. You are validating your business, not idea. What leap of faith assumptions have you made that you need to validate

Think about it from a different perspective. You are validating your business, not idea. What leap of faith assumptions have you made that you need to validate to determine if you have a viable business? For most startups these days, and what I can tell from yours, the hardest part is customer acquisition. So, validate things around acquiring customers. E.g. how much does it cost to acquire a single customer, can you demonstrate that you can repeat that process (even at the small scale). It's hard to summarize these points in a couple paragraphs, I'd suggest reading Eric Ries, and Steve Blank to get an understanding of the principles.