Now! (Or rather, yesterday). Create a community on social media around what you WANT to do even before you do it. Build the community and make them your BFF… Take them on your journey with you and they will give you feedback on your product, website and logo, drawings/mockups, features, bugs, packaging design, what not. They’ll be invested, and a good group of early adopters.
Good luck, you can do it!!
SMI* = Social Media Influencers