Can I change from tourist visa to education visa Thailand?

If you’re already in Thailand, you can only convert the 60-day tourist visa into an education visa, if you have a visa on arrival stamp or if you fall under the visa exemption rule to travel to Thailand, then you cannot obtain a Thai student visa in Thailand, you must either apply for it at the Thai embassy/consulate in your home country or travel to neighboring countries such as Singapore and Malaysia in order to apply from there.