If you like hunting, then you’ll have a good time diving in the Moss/seaside area for halibut. There is some shale reef structure spread out here and there in that area, but pretty few and far between. As said above, the more diverse spectrum of interest starts with the Breakwater/coast guard jetty. It’s an easy dive, plenty of parking and easy entry.
As you make your way around the peninsula, you’ll find a lot of shore diving. The closer you get to Point Piños, the prevailing wind and swell direction makes the diving much more exposed, though when the conditions allow, its well worth the effort.
Getting into Carmel you’ll find the water temps a bit cooler and the vis a bit better, generally speaking. Lots of shore diving offered there as well. From Carmel south is the Big Sur coast. Absolutely amazing places to dive, and incredibly rugged and very difficult terrain to navigate to most of its limited access. Again, well worth the effort.
You can also try Santa Cruz, though the geology is different on that side of the bay, leaving mostly poor visibility. I’ve found some good days there though.
Hope this helps you out some. I’d advise that if you’re planning to dive in the near future. Fill all your tanks prior to arrival as all dive shops are closed till further notice.
This book may also be a good resource for you... It’s a bit dated but will work fine, and look for a few folks that know the area to show you around. Dive safe.