Is it possible to visit an immigration office to get an extention on my 90 days stamp for my Non-B visa? And if so, 7 days, 30 days? Or...?

US citizen traveling from Myanmar to BKK tomorrow. I have return flight to Myanmar and a hotel booked for 10 days. In the meantime, I have decided to stay in BKK and look for a teaching job (yes, I have experience and credentials). My QUESTION is: should I just get the visa exemption at Don Muang? How do I extend after that? After hotel stay is up, I will do month to month until I find job. What about address notification? Thanks for your help....it is a complicated confusing process for a novice.

hi i'm thinking to do a visa run alone not with a company to the bordercrossing near trat going out and in same day, is that border crossing ok for that? or better to do the visa run with a company service? tnx!