Then it is easy. You get a 30 day stamp without any further formalities which you can extend in the country by another 30 days. “visa on arrival” is for certain nationalities, like India.
I live in Myanmar. Emirates flights from BKK to Europe are almost always at least 10k THB cheaper than from RGN. I tend to avoid starting the flight from BKK though in order to avoid adding up too many previous entrance stamps to Thailand.