yes I'm going to study as well reason why I say teach is cause what I'm going to study and learn I can turn around and teach and be under an educational visa as well.
But I understand you are getting the qualifications to teach already.
I would look under the Non-0 visa a little deeper into Non-immogrant B visa and work permit as well.
I think the DTV in your case is overkill and you will need around 14k USD sitting in an account somewhere but you have to do all that here before you leave can't in country.
That depends on your reason I know alpt of people go medical route to treat something keep a few appointments and their good ... wanting to learn culture.. language cooking martial arts ed visa ( more expensive)