Assuming that you have an RPL with no other endorsements the syllabus to continue on to a PPL is fairly standard. Something like this
https://rvac.com.au/pages/becoming-a-pilot
"
Students already holding a RPL will require an additional 20 to 30 hours of flight training, including 5 hours of solo cross country navigation." Seems to be good guidance rather than just quoting the minimum required by CASA.
So, next thing to do is to call a local flight school or two and ask your questions.
PS: you'll get much response at
https://www.pprune.org/pacific-gener...-questions-91/