@Rachael ******
your best move forward, If you are set on working as a teacher in Thailand, is getting the correct visa/work permit for that, and keep everything you are doing online on the down low. Don't advertise for customers in Thailand. Don't be loud about doing it. Nobody would know if you did or not if you don't advertise it. And if it's legit only remote online work, not in any way related to Thailand, then nobody here will care.
On the other hand you could get a DTV letting you legally stay in Thailand for 5 years, and working for a remote company (or yourself online, not for Thai customers), but it's still a tourist visa and not possible to get a work permit with, which you WILL need to actually work as a teacher.