We Launched! Traction Testing Next - where?

We are happy to announce the launch of our product - reviewhornet.com. See product explainer video here: https://www.youtube.com/watch?v=FwNUq57FfQk

Now comes to the important part - Traction. We are a big fan of the book Traction, so now planning to do the Bulls Eye Traction testing for finding the optimal channel. The immediate aim though is to find the first 10 customers.

What was your experience getting the first 10 customers? Did just posting on different channels help? What else would you suggest for getting the first 10 customers.

Our target audience is startup founder, small business owners, realtors, mortgage agents, and anyone whose business growth depends on getting reviews from their customers.