New rider? I'd say no 2 up for awhile. My girlfriend does great with her Honda Metropolitan, but it does struggle with some hills. The 50cc Vino is nice too. I'd stay smaller rather than larger, esp in the city itself. She can also use the scooter in the msf class.
FWIW, I've used her Metro to commute as well, and it's ok for me even at 200lbs.