This is a bit of a long shot, but a lot my social embarrassment comes from my tendency to mumble / be hard to understand. Anyone on here have any experience with improving at that stuff?
Then out a few sentences in the level you feel most comfortable with, plus 1 or 2 steps above. Try whole paragraphs.
PS: drink water and do not push harder if you feel pain.
1. figure out if your mumbling is just a habit or a logopedic issue
2. get a speakers training of the type actors or radio hosts would
If you wonder whether it is worth it, just consider how important it is in both your private and professional life to be clearly understood. There has been a study during the pandemic that showed that people who had the better sound quality in conferences would get their ideas through more often. This is truly the case for spoken words as well.
I think that the answer might depend on whether the difficulty is something with your speaking itself (e.g. you have a speech impediment, accent, stutter, etc.) versus if the difficulty is with the social side of things (e.g. mumbling due to nervousness, etc.).
For the former, maybe a speech therapist could help? For the later, I've heard people say that improv classes/clubs can do a lot for helping people be more confortable in unpredictable social situations.
If you have a medical type of problem that's of course not applicable.