This is a short post, but I just wanted to post these thoughts.
Don't let anyone look down on you because you are young but set an example for the believers in life, in love, in faith and in purity.
We may feel young, inadequate or unprepared but young Christians are God's young warriors. He has clearly written in His word that we can be examples to other believers in several different areas of life. We do need to be careful that we are being a good example. If there are others looking up to you (can be adults, children, siblings), you have a huge responsibility and you must ask God to help you be an example.