Im a newbie to fishing and all Ive got is a rod & reel, and a line of 5 or 6 little 2 inch wiggly illuminous fish.
How basic a fisherman do I sound after that!!?

Anyways.. Ive spotted some rocks that lots of people fish off, and seemingly the place is normally good for mackerel.
SO! Is it a case of cast the line out and leave it there, or should I be reeling it in as soon as the bait comes back in with the tide close to the rocks? (Im presuming mackerel wont hang around right under the rocks, they'll be a few metres out?)
Any advice at all would be gladly received!! Im sure the simplicity of my approach to fishing will disgust all the seasoned anglers, all I can say is sorry!