Hypothetical fix for some people who stutter..?

Hypothetical fix for some people who stutter..? (17M) this shits exhausting. Im already working/studying for 6 hours a day after school, wanna work on my own shit too, dont have the time or fucks to give to this stuttering shit. I wanted to ask, for the people who have a more anxiety induced stutter, yk like the people who dont stutter when they are home alone.. Its a mental thing isnt it? It HAS to be. Hypothetically speaking if i decide that im never going to stutter again, would that work if i had a strong enough mind to be conscious of that promise everytime i spoke and a strong enough mind to apply that without being attacked with negative thoughts? Ik it sounds dumb. But i did something similar just now and it sorta worked, that be it, it was with my family. But still 100% less. Ik it sounds dumb. But what if? Because i know i can speak, i dont stutter when im alone. Its a very big anxiety wall id have to breach, one thats feasted and infected my brain for 15 years, for this to work. Does anyone know anything about this? If so. Please help me.