honestly you talk about how well researched you are, yet you also ask Derry how to reach out to his school. A simple search would glean the answer for you. Psst August 27th
Typically you'd need approval first, then reference your DTV visa number to apply for dependants and spouses. As always, contact the consulate you're using and ask about their preferred method to accomplish this route in an orderly manner.
and I answered as such, stating that many were medical soft power, but plenty of threads on Muai Thai and culinary applications. Yeah and embassy requirements will vary, so read the posts and take notes.
I searched soft power and found quite a few threads, mostly medical but many others. The info is there with succesful application members also stating they are open to PM for more information