You don't need a really heavy outfit to fish the jetties/rocks or even in most beach fishing situations, if you're targeting perch. A typical bass or steelhead rod would be fine - a 9' 7 or 8 weight rod, a leader from 5-9 feet made of hard, abrasion resistant line - and a good abrasion resistant tippet. Since you're talking about close-in fishing, you can easily get by with a normal WF taper, or bass-bug taper line.
You can tie up some simple shrimp flies - get a curved, #6 nymph hook. Wrap your thread (red, orange, or tan), tie in a couple live-rubber antennae at the curve of the hook, a turn of crystal chenille, lock in a mostly stripped orange marabou or saddle stem, leaving a triangle shaped tip that protrudes over the hook eye. Dub in a body of loose marabou, or orange flashy artificial dubbing. Whip finish below the tail that protrudes over the hook eye. Good small shrimp pattern. Works for trout, or jetty fish. Tie it bigger or smaller to your heart's content. You can also tie large versions of this on something like a #1 or 1/0 Gamakatsu G-Lock hook or other offset shank worm hook. You can weight the body with lead wire or fine solder if you need to get it deep, or leave unweighted for shallower fishing.
Aside from that - some simple streamers made of crystal flash, marabou, and bucktail work fine or baitfish immitations. Clean your hooks well in fresh water when you're done or they'll rust.
Some factory produced flies you might like - Lefty's Decievers, Clouser Minnows, Micky Finns, Marabou Muddlers work well.