Stuttering when you’re about to talk to people face to face but not when alone

Stuttering when you’re about to talk to people face to face but not when alone How do i get over this? My stutter is not that severe. It’s a speech block(sometimes it turns into a repitition too) but if ONLY i can get over the first syllable of the first word in the sentence i’m about to speak, i can then go on without a problem. Like this: “Mmmmmister John, how did we do today? Did we reach today’s quota?” (I don’t speak the “Mmmm” out loud). Also when speaking the “Mmmm” there’s like a frog croaking voice with it like vibration or something and it sucks, sounds weird to me 😭 I’m also kind of glad we still need to wear mask here as when i’m about to speak, i’m like about to kiss someone. My mouth be like this 😗 but yeah, when i’m alone or talking to my language instructor on face cam, there’s not that much problem. I tried deep breathing, interjection (Using “uh” or “oh” before the first word) yes they do help but not really with the letters that i struggle most. Also does attempting to speak the first word like SINGING work? Does it also sound weird to hear it? Any other tips?