Questions up top are a good start. We may be able to point you in the direction of guide you weren't able to find online. ( Theres also
http://www.captainwade.com/ he's really busy but it might be an option)
As far as a self guided trip, I do not think anyone rents fishing kayaks in the area that I know of. But right in La Jolla they do rent regular kayaks without hatches or rod holders. So I would bring a dry bag.
License can be purchased online but has to be printed. You can probably screenshot it too and show it on your phone if you get stopped.
Tackle would consist of a solid 30 lb setup, a 30 sized reel with 30-40 lb rod and a 20 lb setup for bass and smaller stuff.
Launch right at la jolla shores boat launch - research the protected area.(MLPA) You have to paddle about half a mile to get out of it.