1 Timothy 4:12, "Do not let anyone treat you as if you are unimportant because you are young. Instead, be an example to the believers with your words, your actions, your love, your faith, and your pure life."
Being young does not lower your self-worth or value in the body of Christ. God chose to use multiple young people in Bible times to convey his message, bring healing to the sick, act in great faith, and do miracles. David was approximately eleven years old when he slayed the 9 ft giant, Goliath. Josiah was only seven years old when he became king of Israel, and Solomon was twelve. And a little boy with a little lunch was the conduit through which over 5,000 people were fed on a hillside. God continues to use young people in the world today.
There are no more excuses for how young you are or your lack of experience. The anointing of God on your life will make an eternal impact. So follow God faithfully and be an example, "with your words, your actions, your love, your faith, and your pure life."