you should try do at least Advanced English and Advanced Maths (2U not general) however some course require any level of english or maths. For example ACU (Australian Catholic University) requires any level of english or maths
- - ACU National (Australian Catholic University))
As for your other subjects they're fine as long as they're subjects you enjoy and know that you can achieve whether that be through talent or perseverence because most courses require an ATAR that is within the 70s and if you want to go to a uni such as USYD (University of Sydney) you'll probably require a higher ATAR of at least 84 or so.
It's also good to remember that if you get a high enough ATAR you'll general be accepted into a course with teh option of doing bridging courses (to catch up on prerequisites you didnt complete and the parts of that prerequisite course that you'll need), unless its one of those really tough years where they're just trying to pick people off.
But its generally a good idea to not hope for the best case scenario and go with the subs you need, but if you dont get them don't give up hope.
Hope this information helps, its sorta just the stuff i've looked at for myself cause my aim is to become a primary school teacher too