As someone who has turned side-projects into acquired products and companies, your primary focus should be learning as much as possible and being as humble as possible (to facilitate the learning process). Chances are overwhelming that your current product "sucks" so to speak, but you should remain confident that you can likely get from "it sucks" to "it's actually pretty useful" fairly quickly by getting it in front of people and letting users use it.

Stay humble, get it out there, focus on learning, and good luck!