Psalm 40:3 He put a new song in my mouth, a hymn of praise to our God. Many will see and fear the Lord and put their trust in him.
If you struggle with telling people about God, then you should try asking Him to give you the words instead of trying to make them up yourself!
No matter how hard we try to describe something, it never quite lives up to having something tangible to grasp with your own hands.
God wants us to give people the truth so they can grasp it with their own hands!