What are the next steps for my son after obtaining a DTV visa for cooking classes in Thailand?

After obtaining a DTV visa for cooking classes, your son needs to continue his enrollment in those classes to maintain his visa status. Currently, there is no requirement for ongoing activity unless he seeks to extend his stay. It is important to be cautious with flight destinations, as flying into Phuket may require proof of enrollment or other documentation. His visa remains valid for five years, so unless he plans to extend or change his activities, he should be fine.