I’ve been a mechanic and engineer for many of my years. I’ve stuttered for all of my years. So I learned in engineering that it’s always better to fail and figure out why than succeed and have no clue why. Stuttering teaches us stubbornness and tenacity. You have two options: 1) give up, and 2) keep going. I think all of us would rather keep going. My amazing speech pathologist told me a thing when I was a kid and it’s stuck with me into middle age: “remember, your disfluency is everybody else’s problem, not yours.” Which isn’t to say it’s not a problem for you to solve, but what people think isn’t your problem. Another wise saying from my mercurial, alcoholic grandfather (who had some good thoughts even though he was a drunk with a bad temper lol): “if people don’t like it, fuck ‘em!” Keep going my friend, beat that stupid stutter down. You’re on the right track. The confidence comes from every tiny victory you win, even if it may seem inconsequential at the time.