hopeful
I have just gone through the Sydney process and all I can say is stay relaxed. If MEL do the same they will make you feel very welcome. I found it helpful to log onto Jet* home page and look at the news articles, and various other pages about the company, they have won a couple of awards this year including best low cost carrier cabin crew for Aust/NZ. remember their promise (all day everyday lowfares etc) and they pride themselves on being warm and friendly.
good luck