I eventually made it to the US in September and have started working at Amazon! It was a pretty intense period in the couple of months leading up to leaving Australia. I have compiled a list of things that that helped me and also what I wished I had known before starting the move.
Keep your documents organised
There is a tonne of paperwork needed to make a move like this, from tax documents to housing applications, a lot of which you'll need to send or change multiple times. It's pretty important because of this that you keep everything organised so that you can find everything easily.
The vehicle in which you keep your items organised is up to you, make a good effort to keep it up though. Personally I used
Google Drive and its fairly new scan functionality to keep all my documents organised and available on all my devices.