Although I drive a lot in the USA, and although I have visited dozens of countries, spending lots of time in each (weeks or months in many), I have only ever driven a car outside of the USA ONCE. This was on the island of Corsica in 2000.
(I too am unable to drive a stick shift/standard transmission. I had not reserved a rental car in advance and it took a couple of days before an automatic transmission was available. Was it the only one on the whole island???)
Kathy