Anywhere that will teach someone in Thai how to use a Mac, whether via Apple or separately. She is Apple phone, Ipad etc, so seems the sensible route to go.
I know they are meant to be self explanatory, but my wife needs to learn to use a laptop, she hasn't used a computer in 20 years, I plan to give her my M1 to use and don't have the patience or the will to teach her myself.