Disclose your stutter, and then, this is very important: voluntarily stutter in the beginning. Once you voluntarily stutter, you should feel yourself easing up and your speech flowing better. Start speaking normally. At any point if you feel tense, voluntarily stutter again. It has worked for me and many other pws that has tried it. It’s very much with a try. Practice beforehand when ordering coffee or other service workers to get a feel of this.