As someone who has a covert stammer, the effects of which are not visible to listeners, I am really heartened to see you reach out for guidance and advice. I had enormous difficulty in school and was asked to read aloud by one teacher as a form of punishment back in the day, but that’s another story… I have found zoom to be challenging in a way I would not have anticipated. I think it the fact I am visible to myself when blocking and feel all the more self conscious. Particularly when they are work related zoom calls. I would keep this in mind… I have found the more I try not to stammer, the more I do…as others have suggested, encourage effective communication as opposed to fluent speech. Encouragement and support goes a long way