You CAN even do your OW course to be combined with a drysuit course, so you don't ever have to dive cold and wet, even on your OW checkout dives. I think a lot of OW courses in the UK are actually taught that way by default (OW and Drysuit combined into one course).
Thank you; I did not know that! I like that idea. I assumed, incorrectly, I would need to do the OW as a prerequisite to any other course; a weird college mindset that I didn't even think to question. I expected the water in CA to be warmer; and it is warmer "in season". When I looked at the current temps I got a bit of a chill running up my spine

