Probably not what you want to hear, as far as I’m aware a lot of people who stutter it’s just something they’re saddled with. I’ve tried psychedelics a few times not for stuttering purposes only tried because I’m a student and it was just a bit of fun at the time, I did find that while I was tripping I didn’t stutter at all but once the trip ended I was back to my normal stuttering self, plus in retrospect psychedelics really isn’t something you should be messing even in pursuit of fluent speech because its definitely not guaranteed it’ll even work and that shit is heavy stuff mentally. But hey if you do find some method or trick that proves me wrong and works for you that’s great. In the mean time though I think the best way to live with your stutter is to surround yourself with people who don’t view you any different for it, along with not holding any value to the opinions of people who ridicule you for it. A lot of the negative feelings and frustrations around stuttering I feel is mainly derived from other peoples judgement and prejudice and not the actual stutter itself. In short just own it, if people are dicks that’s their issue as long as you can get to a point of being secure enough in yourself and how you speak you’ll find that stuff like that will gradually bother you less and less and you’ll find that even the whole ordeal with speaking with a stutter will be a lot easier cos you’ll be allowing yourself to speak freely without constantly checking and trying to correct yourself