what helped me through my stutter and control it better was to pretend to talk like people who didnt have it. i specifically would watch interviews of j mascis and mimic his slower speech and then watch interviews of yoji yamamoto and mimic how he takes random pauses in his sentences. id use his random pauses whenever im feeling a block coming and overall id try and speak like j mascis, super slow and speaking “less”. i got pretty good at it but whenever i get excited my mask falls off and im speaking fast and all my stuttering and blocks come back lol