Im no expert but my best advice is keep it simple.
zip slider
4ft hook length
3/0 or 4/0 hook
baited with mackerel sqid or rag or a combination of them.
always works for me for general fishing in the bay when im not bothered what i catch.
Make sure you have enough weight to keep you on the bottom.
this time of year 90% of my fishing is done with the mackerel i catch whole fillet little strips or just chunks,
Dont get me wrong there are lots of different ways to fish and finesse and targeting particular species involve different tactics but that can all come later. as others have said fish with someone that knows what they are doing. theres nothing worse than not knowing if your doing it right or not.
Just keep at it and enjoy,
Mick