What is the easiest way to get DTV approval through cooking classes in Thailand?

The user is seeking advice on the easiest route to obtain a soft power DTV approval, particularly through cooking classes. They prefer to take classes lasting six months and inquire about reliable and affordable cooking schools in Bangkok or Chiang Mai. There is also a question regarding whether a six-month course would be sufficient for the entire duration of a five-year visa. Commenters suggest specific cooking schools, such as Bangkok Cooking Thai Academy and Love Chiang Mai Cooking School.