You can cure it completely bro same with mine I am am so fluent with my mom and brother and cousins and my friends it's like I am 99.9 percent fleunt, alone I am fully fluent 100 percent natural speaker but with strangers at my natural pace I am only 90 percent fluent what you gotta do even if you stammer force that word out exaggerate the word no matter how much uncomfortable you are and strech out words like explosive words one like b d m n and speak in mirror but with plosive words the word which you found hard it's not a stutter out stutter is cured it's just that we have developed a social anxiety in that period it will take maximum 2 years I have been doing 4 months only I am 90 to 91 percent fluent with strangers and in mass around 87 percent just speak slow down sometimes deep breathing slowly your brain will adapt and you will be free treat this like nothing bro we are fluent