There are so many great shore dive sites around the NSW Central Coast and Pro-Dive know them intimately.
You can explore gutters filled with sessile life or small caves filled with fishlife. One dive site "Terrigal Cave" is not actually a cave, it is a very long gutter with three massive rocks forming a roof section along the top. Always a gteat dive, in the right conditions!
Swansea channel to the north is a great river dive with fantastic marine life and a bonus drift dive when the tide turns. You will find more fishlife in Swansea Channel than in a hectare of ocean.
During COVID19 we are still allowed to scuba dive, but must maintain social distances.