God can use anyone. You don’t have to be the smartest or strongest. But you do need to overcome your self doubt and pride which causes you to not share the message. The message of Christ crucified isn’t too hard to comprehend. But the simpleness of the message continues to be a stumbling block to the wise to this day.
“For consider your calling, brethren, that there were not many wise according to the flesh, not many mighty, not many noble; but God has chosen the foolish things of the world to shame the wise, and God has chosen the weak things of the world to shame the things which are strong, and the base things of the world and the despised God has chosen, the things that are not, so that He may nullify the things that are, so that no man may boast before God.”
1 Corinthians 1:26-29 NASB