This is the only way I made big progress in my 20s, from previously being highly disfluent. It was counterintuitive at first, but I had to figure out how to stop focusing on it and giving so much of a shit. I went from being able to produce a sentence every minute to most people not noticing at all until they'd spent a decent amount of time in my presence. While I'll never be 100% fluent it no longer dictates my life, and even when I do experience periodic dysfluency it generally doesn't spiral out of control, and never has the power to ruin my day or week anymore. It's a total game changer.