Dies it say anything about how often or for how long you have to attend the course? What happens at extension time. I would leave the country if I were you.
I have talkmobile uk sim and thai sim in dual sim Samsung. Only turn uk sim on when I am expecting an authorisation text. Dont do anything that makes your uk bank suspect you live in Thailand or they could close your account. That's what happened to me.
currently I am bringing in £1500 a month to Thailand both to live off and qualify for my visa extension. That is simple enough. What I don't understand is how I prove that those transfers were .made with cash earned before 2024 as it all comes out of the same pot that my income from this year goes in to. My uk tax return will only account for this year's income.