Don't you think that deciding to emigrate (leave for good and only come back for visits) is a bit of an extreme reaction to not finding a job? Or do you just mean you want to work in Australia for a while? I also think if you are really planning to move here permanently it might be a good idea to visit first. Though if you just graduated, extra money for trips probably isn't readily available.
I came over on a company transfer, so it was fairly easy for me to get a temporary work visa. However, I think for a company to sponsor you they have to prove that there is a shortage in Australia. The Australian government maintains a list of needed skills. I doubt journalism is one of them. I assume you know you will have to learn to spell differently, and there are even some grammar differences between American English and the rest of the world.
I don't think pay here is as high as it is in the US, which will be a consideration if you have debts to pay. Remember that when you see that dollar sign, the dollar in question is currently worth $.86. Though as the US dollar continues to fall that will be less of a problem.
All visas are awarded on a points system, and you get points for having a profession on the list, speaking English, and having relatives in Australia. Youth counts, too, apparently. This web site has a section on
jobs in Australia.