Hey mate, welcome aboard!
Quick tip, jump on youtube and type: Fishing Pittwater and see what comes up. I have learnt a lot from others.
Buy some books (AFN) and they give you indications on where to fish and what bait to use etc.
Lion Island is good with the right conditions.
Apps for weather/GPS: Willyweather, seabreeze, BOM, Navionics
Also going out with other members might help you learn a few things too.