Domain names are for humans, not search engines. The domain name has virtually nothing to do with a site's position in the SERPs. While I think your domain name is a poor one for humans to remember, with the hyphen, the number and then the letter "u," it has no effect on your SERP position.

If you want to change your domain name, direct your efforts to your human searchers, not the search engines.

Orange County is locally known as "OC." Obviously, OCYoga.com is already taken. Since domain names are for humans, typing out "orangecounty" plus anything else you add to it, is too lengthy, for humans.

Since it appears that the business is located in Dana Point, may I suggest, CoastYoga.com? How about DanaPointYoga.com? DPYoga.com? Get creative.

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DrTandem's San Diego Web Page Design, drtandem.com