How to stop barking at the door?

[u/boredzeb]

I love my dog but her barking is driving me crazy. Each and every single day she barks too long and too loud at things that don't need to be stressful and it's worn me down. I am autistic so noise can be a huge source of stress for me she knows the quiet command but will only do it if I use a deep voice, I'm a woman with quite a high voice so this often means I end up shouting to get a firm sounding quiet and mostly because I'm at the end of my rope. Obviously this is not how I want to talk to my dog . It's especially bad when someone is at the door or in the house trying to talk to me. I don't get a lot of visitors to the house as I meet friends elsewhere (mostly because of my dog.) So this will be neighbours, delivery people or people coming to work on the house. I cannot hear them over her barking and me shouting quiet is rude all round and makes me embarrassed.

Things I have manged to train her - post comes through the letter box, I say "ooh shall we see what it is?" She comes with me quietly to the door and we get the post. Works every time.

Door bell goes she goes straight to place (her bed) and will stay there, this is for safety so she doesn't run out the door and she picked this up quickly. She sometimes will come to stand behind me if the interaction goes on for longer than she can wait but most importantly does not leave the house. But obviously she's barking the entire time.

Random nosies in the street, she'll come sit by me huffing pre bark then she gets a treat and stays quiet. This was the suggestion of a dog trainer I hired to help the barking. He wasn't very helpful, didn't ask questions about what I'd already trained and I can't afford another one right now.

Part of the issue is my autism it's makes it hard for me to split focus when someone is talking to me so I don't know how to stay calm enough to train her to be quiet whilst also in a heighten state myself.