First off, congratulations on getting the job. The way i do it is i have two first names, i pick the easier one for me to introduce myself. If you have only one first name, maybe you could pick a cool nickname. I know I'm supposed to say breathe and implement all sorts of techniques. But in my personal experience, no techniques work when I'm nervous or in a stressful situation. Also, giving people a heads up about my stutter usually makes it slightly manageable for me, and people are usually understanding, so good luck.