I believe the meaning of life is to give your life a meaning. I’m reminded of a scene from “City Slickers”:
That “one thing” is going to be different for everyone. What gives one man a sense of fulfillment may not give another the same feeling. Essentially, your duty in life is to find that one thing that really speaks to you and do it. Don’t feel badly if you can’t find that thing, whatever it may be, right away. Keep trying new things until something “clicks.”
Learn to enjoy your life as you would a song, which isn’t all about the final note (or where things ultimately end up), it’s about appreciating the journey the melody takes you on along the way.