Don't let anyone think less of you because you are young. Be an example to all believers in what you say, in the way you live, in your love, in your faith, and in your purity.— 1 Timothy 4:12

Timothy was a young pastor. It would have been easy for older Christians to look down on him because of his youth. He had to earn the respect of his elders by setting an example in his speech, life, love, faith, and purity.
Challenge
Regardless of your age, God can use you. Whether you are young or old, don't think of your age as a handicap. Be a shining witness so others can see Christ in you.

O God, fill our children with the gifts of the Spirit, that they may bear witness, transparency, and Christian devotion. In Jesus Name we pray,  Amen.
Jesus Loves You!

(Tyndale)