No, that is just a small part of the continent, and Victoria is just a small part of Australia.
Here is some data to show you: -
View attachment 10369
An interesting fact is that Great Britain is around 15,000 sq. kms bigger that the state of Victoria.
Another interesting fact is that the Great Dividing Range is not one mountain range but a series of ranges and plains that define the water shed line between predominantly the eastern coastal river systems and the western plains of Queensland, New South Wales and Victoria. In Queensland parts of the "Great dividing Range is nothing more than a gentling rising and falling plain which decides whether the rain flows out to the eastern sea board or into the Murray Darling River system for the most part. Some portions of the "range" may only be 400 to 500 m high while the Great Dividing Range is highest in the South Eastern corner of the Australian mainland.
Sadly many tourists believe that a visit to Melbourne and Sydney is all that is necessary to visit Australia, but the reality is that there is much more to see in Australia than these two cities.
Shalom