We don't do things we aren't good at by nature. I wouldn't play basketball because I'm only 5' 1". Find what you enjoy - whether it's racing, flying a helicopter, being a doctor, or stitching clothes together. Once you've done that, you have the passion you need.
It was always a fantasy of mine growing up - my favorite program was always 'Little House on the Prairie' - so I always wanted to wear those looks. When I was a child, I wouldn't let my mom put me in anything but calico dresses and now... whaddaya know, every day I'm in a calico dress, basically, so it's kind of funny.