If God can take his worst enemy, Saul, and make him His greatest messenger, the Apostle Paul, He can and will use any dedicated Christians for His glory--for his ministry. He has a place of service for you, and He will place you there if you ask Him.
Paul knew his calling was by the grace of God, and he loved telling churches about his unique calling.
1 Corinthians 15:10 But by the grace of God I am what I am: and his grace which was bestowed upon me was not in vain; but I labored more abundantly than they all: yet not I, but the grace of God which was with me.
What an honor to work in God’s ministry. It’s all about the message of Salvation, born in the heart of God and devised long before man stood on the earth. The “Good News” message climaxes with Jesus dying on the cross and rising from the dead.
God went to great lengths to save the world. Why? Because He loves everybody, not wanting a single sinner to die without knowing Him. He will even use people like you and me for His cause. Our greatest joy is seeing a sinner saved as we work in His service.