I would like to know if it's possible to convert a tourist visa to an education visa without returning to my country of origin

Hello all,

I am looking in to getting an ED non-immigrant visa for me and my husband. I am a US citizen and my husband is from the UK, with a US permanent residence. Our intention is to study yoga while in Thailand. We are taking a month long yoga teacher training course, then plan to bop around to other ashrams, studios, and retreats. Our School ( for the one-month yoga teacher training) is willing to write a recommendation letter to the Thai Consultant, but they do not know what to include in their letter. If anyone could please give guidance, I would greatly appreciate it. Thanks!