Yup. I don’t know what that is or where you got it (based upon the comments here, it seems like online). A proper international permit from the U. S. looks like this and cannot be ordered online.
It must still accompany a valid U.S. license for the proper vehicle.
You could do an ED visa for learning Thai for starters. If you're open to getting a more advanced education, you could go to college or explore other options. I haven't checked if it's still there, but Cordon Bleu used to have a center in Bangkok. ED visa may be your only option, but, as others have said, it could create issues for other options in the future. The other possibility is a multiple-entry tourist visa. It won't get you a full year, but it gets you a fair amount. I don't know for how long you can do those though. Maybe you could do one first then ED.