https://youtu.be/iRKXOtwcDzI This is just an example. I went to an italian seminar that has helped me a lot, it's called psicodizione: basically, you have to improve the muscolar tone of the mouth because people who stutter (like me) tend to work very little with the muscles of the mouth and the face. Improving your communication and practicing a lot with the exercises that actors do in order to strengthen their speech is a good place to start in my opinion