Hi Coral
Welcome to PIO.
Hope the forum answers all your questions. It's my understanding but I may be wrong (I'm sure someone will help if I am!) that Australia is only looking for people on skilled visa's with very specific skills or trades, not administration based as they can usually fill those vacancies with Australians.
if you have a look on
www.immi.gov.au and look at the MODL list (think thats it's name), it will tell you the skills that they are currently looking for on skilled visa's. It's currently down for maintenance at the moment, expected to be back up tomorrow.
There are other options, such as sponsered visa's etc but as you may be able to tell, I'm certainly no expert . LOL !! Maybe you could try a couple of agents and see if they can advise, according to other posters, some out there do have a free initial consultation.
Good luck, apologies if I've been of no use whatsoever.
Joanne