What you have heard is nonsense.
Some people seem to like making up stories about Australia’s laws that people then believe.
I’m as gun owner myself - and there are well over 1,000,000 firearms in private hands in Australia.
The laws aren’t perfect - we have universal registration and licencing - but they’re nowhere near as bad as people claim.
I doubt she’ll seek to make any changes, but I don’t know - unlike the US, gun laws don’t attract that much attention in Australian politics, and so generally you don’t what a politician thinks about them.
Really. The NRA has made a pretty decent movie, available on youtube, that shows the extent of the Australian gun confiscations. You folks are not legally able to buy something as simple as an M1 Carbine or have a .45 for home defense; that’s pretty limited.