Recommendations for hill training walks near Sydney

Any recommendations for hilly walks near Sydney? I'm prepping for the Routeburn track in NZ.
Been going up and down the Sphinx memorial and bobbin head track, so need some variety, but probably still 'moderate' level.
I want to do day hikes and a couple of overnights.
Thanks
Been going up and down the Sphinx memorial and bobbin head track, so need some variety, but probably still 'moderate' level.
I want to do day hikes and a couple of overnights.
Thanks