How to start gardening in NSW Australian bush?

Hi guys I am new here so please bare with my inexperience.i have bush type block near Wollombi NSW, Australia.
It is clay soil dusty on top & hard under this.
There is roughly 2 acres of this soil which I would like to grow vegetables,garlic,turmeric etc.

Should I hire a motorised push tiller & till it all & add something ? I hear gypsum? Horse manure? Mushroom compost ? Worms ? Other manures ?I know sound stupid question but how do I add it ?do it turn it over into the existing soil ?
I read of a broadfork however I can’t find where to buy one ?

I know lots of questions & any of advice I would appreciate
Regards
DAZ

Read the thread the quest for super soil. Get a soil test done. Start small and expand. Hope that no bushfire comes.
You need to have a plan too. What do your want to achieve? Probably some animals would be good to fertilize, build some fences.
How do you want to keep the kangaroos from eating your crop? Fruit trees and parrots?
I think you first need a good plan and I have written a blog how to print out a scaled plan of your property: scaled plan
Then you need to know weather you are planting crop for yourself or for sale, there is a huge difference in how it has to look like.