Go to the CASA website and find the syllabus you need to study for:
Civil Aviation Safety Authority - Syllabuses and standards
Then just study whatever is written there in detail. If you can do all the things listed you cannot fail. If you want tuition than make sure you go to a ground school where you are taught by experienced instructors who know = SENIOR flight instructors (Grade 1) or theory instructors who hold or helt a pilots licence.
As to "who can tell em the questions" let me say this. In the beginning theory acts in the place of experience. It is important. Secondly, if you want to advance in the aviation game your initial theory is the base on which to build. Consequence: Learn the stuff.