@Ruth ******
Ok, I just suggested a scooter as the ones in Thailand (eg. step-through 100-150cc autos/semi-autos) really are a great fit for 90% of the use-case riding done there. But, if planning on touring around: we did so for a week in the north 2 up on a Kawasaki KLX250 and it was perfect. More than enough power, long susp. smoothed the rough roads and no issues with rough dirt tracks. May be a bit tall (standover) for you though, depending on your size, though can be lowered a bit to fit. Safe travels!