Hi Rus_cb,
Once you start catching fish on lures, it gets pretty addictive.
A good spot near you that I use to fish alot is Rockdale next to the Airport runway. There is a bridge (just up from Bestic street) & if you go under it's on the nearest Rockdale beach side, not the side with the plane watch tower, you will see a walk out (the mouth of the cooks river) & at the tip of it on the side facing the beach, is a real hot spot. The rest of the spots are slow but if you're lucky enough to grab the tip facing the beach before other anglers, you will catch something.
I've attached pictures of the 2 breams I caught there. There are big flatties & trevally there, not to mention the odd big tailor & snapper etc. It's pretty near the Botany Bay Container wall that has the Kings etc & sometimes those big species come in close, so the spots a real smorgus board. I hooked a 5Kg plus Kingfish there on the lightest of gear & after a decent fight I had to lock my reel up so I didn't get spooled & "ping" it busted free. Crazy action when a big King takes a small lure meant for bream.
I use the Berkley 3" Minnow (Pearl Watermelon) & the Tournament 2" grub (pumpkinseed) alot, the grub does better. so I use it more. Only downside with the grub is that the tails gets bitten off easily by the bait fish.
The minnow just reel in slowly & the grub bottom bounce & be eractic reeling it in.
I don't know if the prawn lure you got was a Prawnstar one. That's a hard lure to animate in the water & make it kick like a prawn etc. Takes alot of practice, you can practice your lure fishing skills at Foreshore Drive, it's all sand. Nice spot & sometimes lots of big fish swim in & out of there.
Happy Hunting!