I'm actually impressed that you've managed to find a beach at Baulkham Hills.
In all seriousness, Peter has pretty much nailed the comments.
You've shot in raw, and so many of the adjustments that need to be done are able to be performed in a non-destructive way.
First of all, do make sure that your monitor is calibrated. Unless and until it is, you're not looking at anything that can be easily referred to by yourself, or others.
Then check your wb, remembering that early morning (and late afternoon) shots will generally appear to have a warmer cast to them if you're shooting daylight. If you're shooting with auto-wb, then you need to understand that all of the auto settings, while very good, can be easily fooled.