Helipom,
Following on from Arrrj, its a big process that needs genuine commitment but its worth the effort! I can't add much more re: licensing in Oz but what might be of use once you get the chance to build up your hours and get your PPL is 'Helipaddy' (or this google map which looks pretty nifty for a pint)
https://www.google.com/maps/d/u/0/vi...w.k8UQIjg3PlHc
I don't know what their coverage is in Oz because it seems to be a European/North American thing but I have found that they are adding new sites fairly often and seem to be moving into new places around the world - if they don't have anything in Oz they might by the time you reach the point of having your licence? Friends of mine used it in the Bahamas to find places to land so I assume its useful for island hopping, but again I don't know much about flying in Oz.
Best of luck with the training - stay safe