How do I go by getting a personalized lisence plate for my car

You could check out this link below https://www.dmv.ca.gov/portal/vehicle-registration/license-plates-decals-and-placards/california-license-plates/order-special-interest-and-personalized-license-plates/

I ordered mine online. If you Google personalized liscense plates Ca you'll get the link to apply for them on the DMV website. It's really cool it'll show you what it looks like before you request it.