What do we do with our doubts when God's mission is at stake? In Exodus 6, we learn that Moses had complaints and doubts but God helped to revolve them and put His word on his mouth.
It may not work the first time
Nothing is guaranteed to work the first time. Moses approached Pharaoh in Exodus 5 to let the people go but he refused. Moses turned to God with his concerns.
Just obey!
If Moses was going to be mightily used by God, he had to obey God and just move to the field. Obedience open doors of opportunities to us.

