One of the best ways to get some much-needed feedback is with a beautifully designed survey (because something that looks good is going to be better than random Facebook messages). It also shows you're committed to the idea and professional. You could send the survey link to business pros on LinkedIn (normally has high engagement), through email or even your personal social media pages.

An easy-to-use survey option is Fieldboom: http://www.fieldboom.com. Their site also gives tips on getting feedback and how to build a small business (once you really get started).

Hope that helps!