You Are The Right Vessel For God's Use

God can use anyone or anything for His glory. God choses the foolish things of the world to confound the wise; and the weak things of the world to confound the things which are mighty.

This is how God works and the things that men have despised and rejected is what he uses tp bring glory to himself.
Source
The right person God chose to be a deliverer to his people(Israel) was the one that had a speech impairment.

And Moses said unto the LORD, O my Lord, I am not eloquent, neither before, nor since you have spoken unto your servant: but I am slow of speech, and of a slow tongue. And the LORD said unto him, Who has made man's mouth? or who makes the dumb, or deaf, or the seeing, or the blind? have not I the LORD? Now therefore go, and I will be with your mouth, and teach you what you shall say. Exodus 4:10-12

Moses pointed out his weakness to God and used it as an excuse to quit the mission. He forgot that God is the creator of all things including the weakest thing.

Never allow that weakness you see become a hindrance to what God can possibly do with your life. The Lord became the mouthpiece and a teacher to the one who couldn't speak well, he will surely be your help in times of need. Just rely on him and any weakness will be made strong.