Fourth-generation Native Son of the Golden State here.
Seriously, think twice. I’ve lived in NYC. I know California - California is an ungovernable mess, And it’s FAR too expensive for most folks. It is, I’ll admit, pretty wonderful in many places (and thus I have a vested interest in keeping tourists out), but I personally won’t live there again.
If you MUST make the move, consider this: SoCal is VERY different than NYC. People move at a different pace. Things which are conveniently close to each other are spread out in SoCal. That makes for strange differences - A population density of half or less of what you get in NYC might seem wonderful, but having gthe same number of people spread out over twice the area means that transportation is crucial - and public transport in California is NOT what you’re used to. So that means Cars. Lots of them. Traffic can be as bad or worse than in NYC, and you have further to travel.
The seasons in California are different: Fire, Flood, Earthquake, Riot. Those are your seasons. Well, not really, but Fire and Flood are generally common. Or Mudslide. Aside from those periods, the weather is wonderful. Except when it’s too damn hot. From NYC, you may think you know hot. You don’t. Also: Expect sere and brown in the summer, and green in the winter.
All that said, If you’re going to do it, I won’t be able to dissuade you. And there are some very good and compelling reasons you might wish to make the move. So move smart. Visit the state. Talk to locals. A LOT. Explore.
San Diego is one of my favorite cities. I prefer San Francisco, but that’s a matter of taste. I serverely dislike Los Angeles, but many of the L.A. suburbs are very good. San Louis Obispo is fucking outstanding. IMO, anyway. If you want an etirely different feel, consider Marin, Wine Country, or Sacramento area.
Santa Barbara > San Diego, IMO.