if you can get down to john o brians in waterford and see if he still sells ragworm? get a pack or two for 5 quid each for twenty if i remember correctly!

and pick up some 3 way swivels, size 1/0 long shank hooks and some 1 or 2 oz leads(better to have alot as what your fishing for (WRASSE) tend to put up a great scrap and will try and snag you up in the rocks just below your feet), make your way to a rocky part of the coast preferably the hook on the light house side, the other side is slade and it can be quite good at the harbor wall at high tide. your set up should be quite simple consisting of of your mainline being attached to the top eye of your 3 way swivel, tie a short length of line (known as a snood to the middle eye and at the end of that tie on a 1/0 long shank hook. lastly tie another short snood to the bottom eye of the 3 way swivel and attach your lead! thats it your ready to go! i would recommend you tie up a few of these simple rigs because as previously stated wrasse like to snag you up! thread the ragworm up the hook leaving its enticing wriggly tail to dangle! dont mask the tip of your hook with the bait, make sure the point is visible! once you have baited up( by the way you dont have to use a whole rag, cut it in half or thirds) just drop it down right in front of you into some deepish water or at the harbor wall and just wait for the bites which will come quick and fast!!! the bite will be a tap,tap,tap and try strike the fish just as you feel the vibrations in the rod then get ready for a great little fight! you could also buy some german bait spinners and try for pollack! word of advice, look into shock leaders and there purpose if you intend on distance casting for mackerel!
safety is the key! also dont ever go rock fishing without telling some one where you are going as the sea dosnt take any prisoners! hope this helps dude! best of luck in this fantastic sport we call fishing