Will you become a writer when you grow up?

*gets out crystal ball and tarot cards*

*peers into ball*

You will become a poodle groomer when you grow up. You will marry a short, balding man and have six children, all of whom will live with you until they are 35 years old.

If you want to become a writer, then become one -- now! Writers write. It's what we do. Writers don't have a choice in the matter -- they just have to write all the time.