But to answer the original question, at least partially,
build an infantry and a transport on round 1. After that, try to build 3 units every single time you can, and yes buy a minor for Queensland if the opportunity presents itself.
ANZAC is not just a side show, they are the Allies’ Italy. ANZAC can be crucial to your success.
The 3 fighters you start with can be sent to India ASAP, from where they could stay there or go harass Italy. Or they can stay in Australia and wait for the USA to take a critical island group (especially Carolines) thereby adding 3 fighters to the defense IMMEDIATELY, that the USA cannot possibly do herself. ANZ destroyers can save the USA buying those destroyers. ANZ subs can invite yellow subs to venture out to kill them, and then you can kill the Japanese destroyers. Japan has limited production capacity too, and destroyers are very expensive.
There’s even more that ANZAC can do (IC on Brazil?), but I’ve revealed enough valuable intelligence for one day