1. To be eligible for E3, You must atleast have a bachelors/Masters degree from Australian University and no crime history.
2. Find a genuine consultancy to file an LCA and ask them to give you a job offer letter in specialty occupation.
3. Once you received your docs from US consultancy, Pay E3 visa fees($270 apprx) Book an appointment in any US consulate in Aus
4. Take along with you some docs that will show your stay in US is temporary. Eg: Mortgage/Properties/Investment/Future commitments to Australia.(Plz go through the US embassy website in Australia, which will give you the list of all the docs necessary to bring for US emb interview)
5. Attend the interview. You will know the status weather approved or not on that day itself.
6. If your visa is approved, then it would take 1 week of administrative process(Not to worry). And will recieve your passport in a week.
Dont forget to thank your god when you recieve your passport through post..