exercises and tips to reduce stammering

exercises and tips to reduce stammering i am 22(M), mine is acquired stammering from when i was 12 years old I have extreme social anxiety that i stammer a lot when initiating conversation with strangers I usually struggle with words starting with k,n,s,t also my mind thoughts races fast when i talk, so i think even that might be a hindrance can you guys suggest me some tips or exercise that i need to follow daily to reduce this misery will be thankful !!