There is no scheduled direct flights from Bangkok to Sydney at this time only the TG Sunday specials that are akin to a repat flight.No one knows what the situation will be come March. Suggest you pay a little more attention to what is happening if you are serious about this
I said what I did re your dog in case you need to return to your home country, it may not be straightforward. You say you are from Finland so the change in climate may also be a challenge for the dog so I wish you well. My brother has a German Shepherd that was born in Finland
yep Thailand is not an approved country need rabies shots and so on cost including quarantine flights and so on can be anywhere from AUD 5000 which is why I suggest this person be sure of their intentions and the financial ramifications