You're fucked, but either way go for whatever. My first job was at Whataburger and the store manager put me on front cashier and drive-thru always lol. Basically, I talked to everyone always and yeah, I did more than occasionally stutter but you definitely do begin to get over it. And if you don't and fail? Oh, well. Keep trying, keep going. It's not like you can be somebody else. Work with yourself and see where your boundaries are and keep pushing them. That's what I did. Now I'm retarded for other reasons.