Funny situation here:
I'm going to attend a conference in the US at the end of September to which I intend to travel using the VWP (Aussie citizen). In parallel, I initiated the process to obtain a J1 visa. It is (very) unlikely that I'll be able to get an appointment at the US Consulate General for my J1 visa and get my passport back in time to attend the conference, so I'm going to take the safe option to schedule an appointment once I return from the conference.
My question is:
Can I legally fly to the US for 5 a day visit (conference) as a tourist then fly back to Australia to get my J1 visa added onto my passport and travel back to the US straightaway? Or do I have to remain out of the US for a certain amount of time before travelling back? I don't expect to remain in Australia for longer than the time it'll take my passport to be sent back to me, which I understand is on the order of 10 working days.