I have been trying to learn some Thai for more than 20 years now. Luckily my efforts have been more or less successfulalready!
I started - the first time I went to Thailand - with a book with the ridiculous title "Easy Thai". This is more than ridiculous, because there is no such thing as Easy Thai! Thai is a really difficult language for westerners.
My first serious attempt to learn the language was with the FSI Basic Thai course. Books with tapes. The material is really