It is awkward for me as well.. but one thing I did was accepting the stuttering and not letting myself get away with it..! What works for me little bit might not work for you but may be it does.. I do professional presentations since I’m doing PhD and I was awful last yr and this yr I feel like I’m getting better.. Simply, I just started not getting nervous, it’s difficult but in my mind, I’m like fuck if it’s okay even if u stutter and start speaking slowly..! I’m not rushing things ! Eventhough I’ve time limit, I’m trying to convey things in my own pace and this kinda helps me while speaking to random ppl too..! May be stop getting nervous mentally and u can get better mate..!