I have retagged as above.

The water features commonly referred to as dams are tagged a little differently in the OSM.
A dam refers to the dam wall. The water area is tagged with natural=water + water=reservoir .
waterway=dam

Hi
the name is for name only.
You can use a description tag to give other information.

Hi
The site you have re-tagged as Citipointe Church still has a tag still has other tags referring to a tyre place.
The website for the tyre place has it located on Beerburrum Rd
https://www.ctyres.com.au/contact.htm
Are you able to fix these up?

Looking at the Gosford City Aeromodellers Club it seems obviously not an aerodrome so I have changed it back to a recreational ground.

Hi
welcome to OSM.

The beaches you have placed a point on have already been mapped fully as areas and named so I will delete these.

You have dragged a few points accidentally as is common when using iD. I will fix these.
https://pasteboard.co/b0X5sAAu7GRy.png

The Gosford City Aeromodellers Club should remain as a recreational ground I expect. Aeorodromes are for full sized operational airfields, not models.
Is this area serviced by full sized aircraft or only a model aircraft area?
aeroway=aerodrome

If it is a model aircraft facility, you could
check how this model airfield is mapped. Under the layers icon at the right side, select the Map Data box to see how parts are tagged.
osm.org/#map=19%2F-27.27042%2F153.03908

osm.wiki/Editing_Standards_and_Conventions

Hi
landuse mapping such as farmland and scrub and almost all else should not join the nodes of the roadway network.
Someone is going to have a hell of a job to untangle all this at some stage. It would be best if you adopt best practice at the start.

I didn’t know oneway is implied and optional for motorways.
I agree that drawing the direction of way in the direction of traffic flow is preferable.

If these are sections are oneway for traffic, the oneway tag needs to be added but I think routing works ok without the tag in this case.
oneway=*

The direction that a way in mapped in OSM does not mean that is the traffic direction.

I don't think Access=paid is a recognised tag yet.
I suggest adding access=customers or access=private and fee=yes to Tip Road

Note that these by convention are all lowercase except for names which are normally titlecase, but there maybe exceptions like the ref tag (reference) which could be either.

access=*

fee=*

If you want to check particular tags, a Google search, for example, 'openstreetmap access' will often give more than enough info :)

Hi
way/1053014835 is unnamed but Harrow Road appears intact.
Have you accidentally added a duplicate way (1053014835) on top of Harrow Road?
If you want to add special restrictions to just the road in front of the school, you just need to split Harrow Road where the restriction signs are and just alter the tag for that small section.
I don’t have access to a computer to check properly so will leave for you to check, thanks.

Private roads are mapped. access=private or other more suitable tags should be added if known

Hi
name of medical facility is misspelt

correction…
There would be ‘no left turn’ signs there if it was illegal.

The wiki describes the difference between roundabouts and rotaries and this one with right of way whilst on the roundabout seems to fit the roundabout criteria, even though there are slipways to bypass the roundabout, but I am no expert. Slip ways like this seem to be gaining favour in traffic management - I guess due to reducing interaction with other traffic on the roundabout.
I expect that if you missed the slip lane, you could still enter and exit where you say your not supposed to go. This happens at times when unfamiliar with the area and the gps is a bit uncertain or slow. There would be no left turns there if it was illegal.

The name is Bowls not Bowels as in their website url

no response, reverted and realigned ways.

Hi
I notice you have joined the entrance from Mountain Hwy to an exit on Colchester Rd and another from Mountain Hwy to Albert Ave.
These should not join at the same node even when close.
See "Roundabout with correct connections" labeled image at right side on the wiki
junction=roundabout

cor...actually this dataset is ok to use and is supplied by data.gov.au
https://data.gov.au/data/dataset/geoscape-administrative-boundaries