I learned Thai from a US govt school in DC 50+ years ago. We were not introduced into the actual Thai characters until at least 6-8 weeks into the school (1 year long). then we began seeing the characters for the beginning conversations we were taught. Tones were very evident too and some people really cannot do tonal languages very easily, like me an American but in the military, i passed an artificial language test and then progressed to an artificial "tonal" language test which I also passed and studied Vietnamese for a year. You are lucky to be here in Thailand and can immerse yourself into the language very easily. There are numerous schools that provide the language acquisition, watching television programs of any type, news is difficult at times but even that can help. I also note that Thai's can usually determine what you mean even if a tone is wrong when you speak it, don't be embarrassed it is just like the writing, Thais can figure out what the meaning is just by looking at tones without the characters, amazing to me anyway at how well they really understand their language. My daughter is fluent in Thai and English from school and my wife and I, plus she loved BTS KPOP (11 years ago songs all in Korean) so at the same time she was studying in school (included Chinese besides Thai and English) she taught herself Korean - easy she said as non-tonal and even the Chinese she said is easy because she speaks Thai and understand the tones. She is now fluent in Korean also (tested on their international test at the highest level) plus she taught in the 11th grade Chinese at another High School. She is currently studying on her own Japanese which she says appears to be fairly easy with her current languages and similar rules. Since I don't hang around with local on a regular basis I find that I have lost some of my fluency as I have studied over 10 languages several to very high levels and I notice occasionally when having a conversation with a Thai, a foreign word will sneak into a sentence - i then notice a strange look on the listener's face and in my mind all the words in the sentence are correct, then I will realize that one word comes from a different language that I have been fairly fluent in also and apologize but the Thai's are very understanding and seem to really appreciate it when a foreigner is trying to converse in Thai . I have never had any Thai complain about my Thai language capability but all have praised it and me for talking to them as once they note that I can speak Thai fairly well they always have questions about my life and where i am from and then questions about my home country. There are also numerous online learning too if you just want to get started and then maybe progress to a school for further use. Best of luck and IMHO any Thai you learn can be useful.