I got mine DTV as a German from the Australian Canberra embassy. Was done in 4 days, super straight forward. Just send a treatment plan and an appointment confirmation.
I had the same issue as I don’t have a residence address anywhere, I wrote that as a pdf and uploaded it…. Then they asked for my arrival boarding pass I came with….eventually they approved the visa
Best way is to get a bloody Thai Gf, she wil teach you..... Only need the phrases for arguing anyway, they are easy to learn... The rest is same same but different.