Hey man. No its not as scary as it sounds. Just do your very best in the interview even if you stutter. And as for talking to customers, if you get through your first customer, it'll be easier and easier until you get used to it. Next thing you know, you won't be thinking about your stutter and just think about helping them out. My first actual job in my field (junior accountant), I told my boss that I stutter first of all. Then he did not mind at all, as long as I'm a hard worker. And that set me up for a smooth transition to the job. I think it really helps if you tell them you stutter, it will boost your confidence. Good luck man