God doesn't care about your past. He will use you for His glory!
If we follow Him, He will make us fishers of men. Matthew 4:19 - "Come, follow me," Jesus said, "and I WILL make you fishers of men."
It stands to reason, that, if Christ will accept any one of us that comes to Him then He can use any of us to make Him known to others.
The next time you feel like God can’t use you, consider the following people God used in spite of their inadequacies: Noah got drunk. Abraham was old. Isaac was a daydreamer. Jacob was a liar. Leah wasn’t all that pretty. Joseph was abused. Moses couldn’t talk plainly. Gideon was afraid. Samson was a womanizer. Rahab was a prostitute. Jeremiah was bi-polar. David had an affair and conspired to murder. Elijah was suicidal. Isaiah preached naked. Jonah ran from God. Ruth was a widow. Job went bankrupt. John the Baptist ate bugs. Peter denied Christ with cursing. The disciples fell asleep while praying. Martha worried about everything. Mary Magdalene was demon possessed. The Samaritan woman was divorced (several times). Zacchaeus wasn’t very tall. Paul was overly-religious. Timothy had an ulcer. And Lazarus was dead!
But God used every one of them to make Himself known to others!
"Come follow me", Jesus said. Not, "Be perfect first, and then come follow me, and I will make you fishers of men."
What a joy to have a part in sharing with others what Christ has done for us! Do not let yourself be deceived into thinking you are not qualified.