i learnt in a deisel mini and started pulling off on the clutch. which whilst it worked, it meant I pulled off very slowly.
After a few lessons I started practicing in the parents fiesta (petrol). you certainly cannot drive that like a diesel cos it stalls! you need gas before clutch. after getting used to the fiesta, i started to drive the diesel mini more like a petrol, and that ensured I didnt pull off at crossroads at 1mph.
if ya keep pulling off on the clutch start saving for a new 1 cos it wont last that long
i have a friend who learnt in a diesel who drives his petrol like a diesel. he is forever stalling (sometimes repeatedly) when pulling off and even when ti deosnt stall you hear the engine really really stuttering. Whilst it isnt going to make you have an accident, it does make other drivers (and people in the car with you) think you are a bad driver
hope this helps