If you have never done it, just for one day believe that anything is possible. Believe that the world is yours. From this moment on, you will believe in one mindset:
"What would you do if you knew you couldn't fail?"
How hard would you go in the paint if you knew you could make nothing but buckets. If that's the metaphor that will bring it home to you, use that.
So believe and work for it. There is nothing stopping you but you.