Thai Cooking Lessons?
Have you considered looking at some of the courses offered at the Culinary Institute in Hyde Park, NY or Institute of Culinary Education in NYC. ICE offers a huge recreational division, including a course on Asian cooking (one of many in this category.
or just search on your own at, https://web.iceculinary.com/
You might get lucky and find something more local, or at continuing educational programs at local colleges. If all else fails, go with ICE. They have crash courses (sometimes just a couple of hours) on everything and are fairly inexpensive.