Some answers. You'll be fine on paddle kayaks. Hobies are great but not a requirement to catch fish. Many reservoirs do not allow water contact. All sit on top kayaks, not just Hobies, are considered water contact so theyre banned. Sibikis are the way to go. No registration for kayaks unless they have a motor. From Kellogg park go south a few blocks and head out from the actual launch. Go out passed the reserve line and south. What else. I check some surf web sights as well as NOAA and NWS. The swell model I like is
http://cdip.ucsd.edu/
If its your first time or you're not very experienced I highly recommend getting comfortable in bays or calmer water before heading to La Jolla. And practice surf launches and landings before you actually got out with gear. Best o luck, Mike