Yes , Its is so much information I cant share bcoz its not organize and well structured . You have extended it further and also explain your thought on this that is good . And another point is to desensitize yourself from fear by going in that situation with 'Intention of just saying the purpose or content confidently and in Calm way And Not an intention of being fluent , good impression , reaction of listened and just ignore negative thoughts That's it . Fluency doesn't require force or anything it comes by its own , it has its own flow but when you try to become fluent your brain try to help you by adding extra force as if to force out word but , this is response of brain in pressure , fear or of doing task that is important (like proposing to your love partner ) . This response is helpfull when you do a physical task like running , fighting or some physical task But it acts totally oppositely in situation when you need to focus , when you need precision ( singing ) ,delicate task like making paintings . So , that's why singer practise like a singer and when they go on to the stage they behave and think like they are not singers that help to reduce pressure .