Welcome, there is an orangecounty OC group they can be found on Facebook, that might be a good place to start for info about your area. Some fairly common recommendations prior to venturing out and exercising your 2nd and 1st ammendment rights OC'ing.
1) Research over risk- Open Carry currently in CA is sort of like being a mixed race couple walking down the streets of America circa 1955. Things to expect, law enforcement encounters (bad and good) disdain and fear or even disgust. Many people recommend spending at least several weeks reading as many threads on this forum as well as Calguns in relation to open carry. check out www.responsiblecitizensofcalifornia.org and read all of their forum posts. Watch at least several dozen youtube videos of open carry encounters and their comments, and completly understand the entire CA penal code as it relates to firearms. Study all the LE training bulletins posted on californiaOpencarry.org front page. PLEASE DO ALL OF THIS BEFORE attempting to go out and OC.
2) Find experienced OC'ers to go out with first few times, be prepared with both a lawyer and money to go to court if falsely arrested and accused of a crime, have 2 reliable recording devices on you recording while carrying, 1 must be video.
3) Be prepared to be a goodwill ambassador and teacher of 2A rights and a proponent of carrying and engage citizens and LE you meet with your knowledge and pamphlets. Dress the part, California bussiness casual, not red neck gun nut camoflouge. Be prepared to be Hot stopped or felony stopped by overzealous Law enforcement.
4) learn verbal judo techniques for dealing with LE that over step their authority. Carry sterile, (no Identification, and never give your name to LE for your own safety)
These are just some of the things off the top of my head from myself and others who have been doing this awhile. Much work has been done before you got here and much more still needs to be done.