The paperwork process involves the BATF, which takes the $200 tax and does the background check. Mugshot, fingerprints and most importantly, approval of a local LEO Boss--Police Chief or Sheriff. BATF has a website with all the pertinent info.
States can by law deny such ownership; or, unofficially, by merely creating a situation where no LEO will approve.
I don't know, but think it probable that California won't allow any new acquistions. Somebody else will have to give the correct answer.
Really, ya oughta move to a more civilized place.
, Art