I think the best thing for you do to is contact some people with the Yorkie clubs in California. You can go to YTCA.ORG
York Shire Terrier Regional Clubs in America for contact information.
You can also go to
http://www.infodog.com/panels/ca.htmto look for upcoming shows in your area.
Have you ever attended a show? Has your dog been evaluated by a reputable show breeder?
Do your research. Look for a handler that is experienced in showing and grooming yorkies. There is so much involved. Good luck and please keep us updated.