"Moses said to the LORD, 'O Lord, I have never been eloquent, neither in the past nor since you have spoken to your servant. I am slow of speech and tongue'" (Ex 4:10).
One of the greatest affronts you can commit against God is to refuse His calling that He has placed upon you. Imagine arguing with your Creator and telling him you know better than Him.
That is exactly what Moses did when God called him to be his spokesperson to Pharaoh.
God and Moses got into an "I know best" competition. "The LORD said to him, 'Who gave man his mouth? Who makes him deaf or mute? Who gives him sight or makes him blind? Is it not I, the LORD? Now go; I will help you speak and will teach you what to say.' But Moses said, 'O Lord, please send someone else to do it.'"
God actually relented in the argument. Can you imagine that? But He's not happy about it. "Then the LORD's anger burned against Moses and he said, 'What about your brother, Aaron the Levite?'" God has to use Aaron as Moses' mouthpiece.
Have you ever not pursued something because it had to be perfect? There is a fine line between doing things with excellence and being a perfectionist. Perfectionists become argumentative with God. They refuse to step out in faith and obedience because they care too much about what others think if the results don't turn out perfectly.
I battled these same demons when God led me into a writing and speaking ministry. "Lord, I am weak in grammar and you know I'm an introvert." Then He reminded me "...for my power is made perfect in weakness" (2 Cor 12:9).
When God places His anointing on you He uses whatever level of skill you have to fulfill His purposes in your life. This is why you need not fear moving into an unfamiliar area if He calls you there.
What is God waiting for you to do? It may be time to step out. He specializes in "cliff-catching."