I think 🤔 if you don't no how or you don't have a friend or family member to fill in the form there is help at the airport but I'd say 1hr to do it .
No you can not as i rent a private residence and have for 4 years ,You have to go to immigration within 3 days with passport and copy of residence you are staying . I do at jomtien immigration. Take 10 minutes. If you rent in motel or a residence ( not private) they do for you
yes they can as long as you have lived in Australia as a resident for the last 10 years and have been in Australia for the last 5 years more then 6 months of the year prior to 67