First 10 customers

I just finished building my seo research tool

I launched tools in the past with product hunt and hn and with ads
this one i want to take a slower approach really working with 5-10 customers to work on the product

my question is how did you get the first 10 people to try it?

My target audience is any internet business that needs help with content creation plan/idea so it's super wide and hard to target.