And Saul said to David, Thou art not able to go against this Philistine to fight with him: for thou art but a youth, and he a man of war from his youth.
1 Samuel:17:33

Youth can be defined as; the time of life when someone is young; the time when a young person has not yet become an adult Or the time when something is new and not yet established...

What is that thing you are scared of doing because you are a youth?
What is that project you have left because it's still relatively new?
What is that passion you have stopped pursuing because you are young?

Do not be discouraged because of your status or the experience you think you lack..
Go for your passion and pursue it diligently...

Remember David refused to bend to what people say concerning his youthfulness
Youth signifies strength!
Work in this strength!