Bangkok, as all of Thailand, has layers. Time and perseverance will help you peel back those layers. Each new layer will bring you closer to the "natural" thailand. But each new revelation can bring agony or ecstasy. Learning as much of the language as possible will make most things easier. And it's a good idea to start with the Thai alphabet.
Early on, learn the basics of Thai manners.
- Never speak ill of Thai monarchy
- Don't raise your voice
- Smile a lot .. or look inscrutable
- Never touch a Thai woman unless invited to do so
- Don't touch a Thai on the head, especially a man
- Learn to wai properly .. and when not to wai
- Learn a few basic Thai phrases
- Don't point directly at someone
- and many more
- Cannot work without a permit
- Will not be allowed to work in certain professions & trades
- Cannot own land in your own name
- Will often be subjected to "double pricing"
- Must maintain a visa status with periodic rules changes