Considering it's a twin board, I'd assume you'll want to ride switch. 15/-15 duck stance is excellent for that.
yea i agree with that but i think it really depends on what youve been riding before. and if it was rentals, most likely it isnt the duck. it took me a few days to go from 15/0 to 15/-15 with the same confidence while learning switch. i just raised it 6 degrees til i rode well with it, then raised it another 6, etc.