My high school cross country coach taught me to swing my hand up to my mouth while running as if feeding myself. The idea was that if I exaggerated the motion in practice, my arm motion during the race (when I wasn’t focusing on it) would be closer to optimal. This worked.
Years later, I would have my language students practice something similar when working on their pronunciation. Sometimes it was popping the air for the p consonant as hard as possible. Other times it was making a final consonant sound as soft as a cloud. This also worked.
The idea here is that when we have an unintuitive skill, exaggerating it on both ends can be useful in reaching a more optimal medium.
Too shy, boisterous, polite, slow to speak? Try to exaggerate beyond what you think is natural. Then gather results and adjust from there.