How to Start in KU or Go Wide?

I'm thinking, since I'm starting with a pretty small list, my goal is to get my book in front of 10,000 pairs of eyeballs. And then once I do that, they can then figure out if my book is for them and if so great and if not, that's also fine. So I'm thinking of trying Kindle Unlimited for a short period of time. But question number one is, does that target people in Kindle Unlimited? Does it have anything to do or are they with it? Are they two separate issues? Yeah, absolutely.