So you should always stay on top of people's vesting schedules.
What being a founder means, is signing up for this years long grind on execution - and you can't outsource this.
You have to be decisive. Indecisiveness is a startup killer.
Remember that the idea will expand, and become more ambitious as you go.
In general though, if you look at the track record of pivots, they don't become big companies.
The best source by far for hiring is people that you already know and people that other employees in the company already know.