Exodus 4:30 And Aaron spake all the words which the LORD had spoken unto Moses, and did the signs in the sight of the people.
I love the story of how Moses is unwilling to talk and do what the Lord tells him to do. He complains. God allows Aaron to speak for him. Yet this verse is one of the only verses where we see Aaron do much. It will not take Moses long to realize that this is exactly what he was meant to do.
It makes me think of how many things we may use as excuses not to do what we should do in the ministry. We have excuses. We make up anything to get out of doing what God wants. But as He works in our lives we realize that His will is right.
I challenge you to just go ahead and do what He has for you. No need for substitutes. No need for someone to do things until you decide if God was right!