Melchester

I live near Warriewood Beach. I have just bought an 8 foot rod and reel combo. Where do I go (literally and figuratively) from here. I want to catch some fish I can eat. I know nothing about fishing. I would be very grateful for any help and advice you can give on ... what tackle to buy, where and when to go, what fish I should expect to pull out of the water, and which ones I should throw back. Thanks in advance for any tips you might have time to throw my way.