I am afaid its all part of the learning process Dan
Try a variety of methods, baits etc in a known fishy area and success will come
Its down to some luck, good bait, skills and Rod Hours
My advice would be to keep trying, keep the rigs and tactics simple and persivere
If you are in an area known for certain species, learn a bit about targeting that species and go for it
Ie Xray
Simple running ledger, 4 ft trace 40lb mono, 4/0 hook
Fished hard on the bottom
Whole squid, sandeel or half a mackeral fillet [cut longways]
keep the baits fresh [new every 20 to 30 mins] and Rays should come amongst the doggies.
Ignore the temptation to move away from the dogs and to change tactics target the small bait robbing fish, as that will weaken your chances with the bigger fish.
Tight lines
Charlie