As far as I am aware, they will offer you a position by a phone call, or email if they can not contact you by phone. You then have a conditional offer based on passing a medical. If you pass that you wait for a start date. They are aware that a lot of people need to give a months notice from their current job, so your medical should be passed before this, giving you time to hand in your notice.
I think the last group have had about 2 months notice going by messages on the forum here.
I was told there would be courses running every month in 2021, but that was before the recent take over by the WA. If there was a course running in January or even February next year you would think that people would need to be informed round about this time really, especially with Christmas coming up. It does make me a little concerned that the courses could be delayed significantly and that they may decide they do not need as many drivers as they originally thought at the start of the year.
It is a worry, but unfortunately, there is nothing we can do but wait.
again the above are only my thoughts, and probably have no basis in reality whatsoever!
regards