Hey idk if i can help since I do not stutter myself but i do know people who stutter and people with quite severe social anxiety, and they said that i can give good advice and tips for preparing for this kind of stuff and also holding an interesting presentation, in school especially, so if youd need some help dm me and ill gladly give advice similar to what i gave them. Cant guarentee itll work ofc as all people are different but i can give it a shot.