Howdy and Welcome Aboard CF!
You are not alone in your dreams and needs.
And, there are numerous CF members in Australia
who may be able to advise you about specific boats or designs found in Australia.
Stick around, spend some time reading this forum and some of the many threads (topics) in the forum archives
and you will be better informed and prepared to take the big step of buying
your dream boat.
I am no expert, but I will send you a few tips in a private message (PM). The best advice is to simply spend some time reading this forum, in order to see some of the many answers to common questions and to see how diverse opinions can be on any topic.