I know that there are a lot of Thai language classes down south. Los Angeles has a lot. But if you're not from around here, of course it'll be inconvenient to you. Perhaps the best way is to take online classes for the language if you can't find anywhere local.
Another option is to search for teachers/classes online at craigslist.org just choose your city and type in the search. I found a class in San Francisco for only 15/hr...but I need a job 1st lol. Good luck!
I started in July...I'm doing well. I can read and write a little now. My reading is better than my writing. I already knew how to speak and listen so that helped.