When God is birthing a great idea in your heart as a leader, eventually you’ll have to roll it out and start the process of making it a reality.  And I’ll guarantee you that right after this process begins, you’ll be bombarded by your second guessing mechanism. 
That’s completely normal.  You should move forward anyway, most of the time.
Of course, if the Holy Spirit raises legitimate red flags through Scriptures, others, or in your spirit, abort mission.
A lot of the time, however, it’s not God who’s slowing you down.
It’s years of normality, mediocrity, and comfort screaming:
“What if it fails?  What if you look stupid?  No one’s ever tried this before.  There’s so much to lose.  They’re all gonna laugh at you…”

Interrupt these thoughts mid sentence.  Cut through the internal rhetoric and act decisively.
The space between the concept and the execution is a dangerous neighborhood where dreams are often found dead the next morning.  You don’t want to circle that block for very long.
Get a word from God, and go with it.