Watch out when you enter details, the cursor sometimes is one space ahead to the right. You need to make it go full left. Took me ages to find that out.
You don't need any money in a bank but you need covid medical insurance to cover 100,000. And all the other embassy requirements. The only thing you don't need is a visa, Aus passport just turn up and get 30 days.
no idea but it's not a good idea here. Things can get very nasty for the slightest trace of prohibited drugs. If you have a prescription you should be ok but check with the Thai embassy or Thai customs before. Not sure on things like that but better safe than locked up.