Yeah I know what you're talking about in the 2nd para. Whenever I've wanted to express a large amount of information to someone, it usually goes well until the point my mind thinks '' Oh no this is a lot to say, and the stutter is going to make it hard ''. One way to get through that is to just focus on the information you're conveying instead of the delivery. Yeah singing and speaking are two different things. A lot of stutters can sing without any issues :)