Shrooms helped me out with A LOT. Not only with depression but with anxiety. When I was on a huge dose, I was basically forced to practice diaphragmatic breathing and the months after that trip, I was not 100% fluent but I was so much more relaxed when talking, I only stumble on some words. But just like any other psychedelic, it’s good in moderation. You can try micro dosing but doesn’t do much for me. Best advice is to accept your stutter. Because our main problem is not the stutter itself but what we think of it and what we think others think of it.