Many of us ask these questions. Why am I here? What is my purpose in life? What am I supposed to be doing here? There are many workshops intended to help you discover your purpose.
I found a surprising answer to this question reading Jane Roberts' Seth book, Dreams, 'Evolution,' and Value Fulfillment, Volume One.
"Many people ask, for example: 'What is the purpose of my life?' Meaning: 'What am I meant do do?' but the purpose of your life, and each life, is in its being(intently). That being may include certain actions, but the acts themselves are only important in that they spring out of the essence of your life, which simply by being is bound to fulfill its purposes." (page 225)
What surprised me most in reading Seth's answer things seem obvious -- just existing is purpose enough. We would never have been created if there was no meaning and purpose. Our existence, as an aspect of All That Is, sufficient.