Go to a Thai University and sign up for a masters degree. Cheap, I know. They will take care of your education visa. Look into English major problems. Let me know if you need contacts. I was a lecturer/teacher at a government Uni near Rangsit.
Yes. Universities will help u with the visa. U just need to know how many hours are required by immigration. The Uni will help you. I worked at VRU Uni in Pathumthani and know of students foreign who signed up. Try Humanities department and or Education English Majors. U have to go to the Uni foreign affairs department. Look up VRU in Pathumthani. It is on the border to Ayuthaya and near Rangsit. About 7000 baht per class.