-1), No, you are supposed to be in the country where you apply. 2), Always have to apply outside of Thailand. What embassy will you apply through. If they don’t have evisa system, they will need to physically take your passport, so couldn’t travel if you don’t have it.
Anonymous participant I was lucky and got approved there (digital nomad), but agree, you can’t talk to anyone. My partner, who is Thai, was with me, and was surprised at how the staff acted