I second Toastmasters. Just visit a local meeting before committing to see how it works. There is a Toastmaster who is the emcee that runs the meeting and mak

I second Toastmasters. Just visit a local meeting before committing to see how it works. There is a Toastmaster who is the emcee that runs the meeting and makes sure all roles are explained, and one of the roles is an "Uh/Um Counter" - litteraly someone who counts how many times each speaker says "Uh", "Um", or some other filler word, and then provides feedback or suggestions going forward.