You have to let your team get all the credit for all the good stuff that happens, and you take responsibility for the bad stuff.
The track record for founders that don't already know each other is really bad.
You certainly don't need to have everything figured out in the path from here to world domination.
... how much time you should be spending on hiring? The answer is 0 or 25 percent.
Remember that the idea will expand, and become more ambitious as you go.
These all sounded really bad, but they turned out to be good. If they had sounded really good, there would have been too many people working on them.