Engineering is always demanding.
I'd think twice about doing Engineering at ANU though UNLESS you really do actually want to do systems engineering.
You CANNOT do a normal engineering degree at ANU - Civil, Electrical, Chemical, Mechanical, ANU doesn't do them, their electrical related majors don't cover power engineering, they're effectively electronics engineering which is a small field in Australia.
Seriously look at the major you want to do and work out where it might lead - some of the majors that ANU offers aren't necessarily going to deliver a great career outside of academia.