@Peadrew ********
to add to Garrett's post, if your home country license is expired you will have to take the written, and the driving tests. If you don't have a motorcycle endorsement on your valid home country license you'll have to take the written, and driving test for motorbikes. They give you a book to study while you are there, and when you are ready you take the test. You only need a 70% to pass. The driving tests are not that difficult. At the Land Transport department across from Chatuchak market, where you get your license in Bangkok, any of the motorbike taxi drivers can take you to the local clinic to get your medical certificate. Before covid it was bt170 when I renewed mine, not counting the bt30 motorci taxi fees. Appointments now can take a few months for new licenses, so be aware of that.