You are serving your purpose in everything that you are, do and every second of your life. You live in purpose even without your knowledge. There is a reason for the 'make up' that you are, you had to be exactly as you are from birth/childhood to date because your purpose has been in conversations, relationships, abilities, goals, failure, play days, etc in all scenarios imaginable that you have. No one can impact anyone as you except you. You are the Purpose, it doesn't start at a certain age, attained after some accomplishments, need a certain audience, it is not learnt or qualified you are your Purpose just as you are..