You most probably will catch fish of the rocks and beach but the targets you mentioned above aren't the easiest. Rock fishing and beach fishing may share same rod and reel but rigs are quite different and with rock you usually burley them close to your feet and you will normally get some fish like drummer , luderick or sweep. Beach fishing is normally finding gutters and dart, whiting in addition to your target species may be there. You most probably will catch other species first until you refine your techniques(doesn't mean changing rod and reel but just the way you go about targeting them) and learn to specifically chase fish you want. Not everyone fishes only for target and no matter how hard you try , other species will take your bait unless you are marlin fishing but that's a topic for another day.
Most snapper reports I see are off boats and some times off rocks. I've caught snapper on lures but they were just about legal and am sure you are looking for some 2kg, soon to be fried in butter, specimens. If you want to target species, read articles related to rigs and bait and type of locations (structure, kelp, gutters etc).
All of us here have gone through a process of refining our methods even those who have been fishing for ages so it will take time but end of the day you just have to enjoy the spectacular views and a screaming reel.