I don’t believe it would help asking in advance as I flew in from London yesterday via Thai air as I do regularly yet it is very rare that Thai air staff are on check in desk it usually or Canada or India or some other, I had 90 day return as usual but no visa never been asked
you dont look young , and say your qualified and from london , yet looking for work , if you have not got enough to sell up and afford to live thailand now , not happening , good look job hunting 😁