I'm a long time So Cal diver, and many of the divers I know have moved here from other parts of the country or the world. Some adapt to the colder water, some don't. As I've said before, if you dive here long enough the part of your brain that senses cold dies.
Mylee, I see a drysuit in your future. My diving is split pretty evenly between a drysuit and a 7mm wetsuit (including a hood, gloves, booties, and open-heel fins). On a typical dive boat you'll see about half the divers in drysuits these days. Drysuits are expensive, often require custom fitting, take some time to "break in", and training is recommended, but it's all well worth it when water temps range 54f to 62f. It's not uncommon to hear divers scream "I love my drysuit" or just as often "I hate my drysuit".
Surf entries and exists are the biggest challenge to divers new to this area, but Mylee, you've already said that shore diving is not of interest to you, so I'll skip that for now.
Read the recent posts by drrich2 on the So Cal board. They are the most comprehensive explanations of our local conditions and methods of dive boat operation that I've seen written from the perspective of a diver new to So Cal diving. I can also second turnburgler's suggestion to try the Casino Point dive park. It's a shore dive, but it's an east facing entry so surf is usually not an issue. The park has all the best elements of So Cal diving in one easy place.
Finding buddies can be a challenge here. I'd suggest joining a dive club. Many scuba shops support a dive club, and there are even some new web based clubs. Generally, California divers are friendly, and you'll probably make some contacts on the dive boats. But if you go alone on a dive boat you may find some reluctance from other divers to take you on as a buddy, so take a friend or be honest about the level of your skills with the crew and other divers.
There's a boat out of Oxnard (about an hour south of Santa Barbara) called the Spectre [link:
Spectre Dive Boat, California Scuba Diving]. The Spectre regularly visits two of the Northern Channel Islands (Anacapa and Santa Cruz), and specializes in day trips for beginner and intermediate divers. I've been on this boat many times and I recommend it highly.
I've heard it said that if you can dive in California you can dive anywhere in the world.
So, I hope you find a way to dive with us. There are some truly amazing things, and some great new friends, waiting for you here. Good luck.