For early employees you want people that have somewhat of a risk-taking attitude.
What you want to do is innovate on your product and your business model, management structure is not where I would try and innovate.
You should always know how you're doing against your metrics. You should always have a weekly review meeting every week.
You cannot create a market that doesn't want to exist.
The second part of how to hire: try not to.
As the company grows and about this 25 or so employee size, your main job shifts from building a great product to building a great company.