A lot of people decide what they want to do with their life from an early age. The little kids are usually a fireman, police officer, doctors, superheroes, and the like. What everyone should be asking, is what is God calling me too? That is the important thing to understand and to know, what is God calling me to. Is he calling me to the priesthood, consecrated life, religious life? Or is he calling me to be married, or even single life? These are the questions that everyone should be asking. What is God calling me to? Here is a little video that might help you.
If have any desire or discerning a call the priesthood, religious life, consecrated life please come and talk with a priest and they can help you to discern where God might be calling you to. Also, the can pray for you, which is always an added benefit.