I’m not an expert at this though I’ve been researching stuttering methods and ‘cures’ for years. moreover If after dragging the M with all the steps above and still end up stuttering, my final deduction would be that you aren’t connecting your words and focusing too much on the word rather than how you want to present or frame the word/statement. this can take practice but my final suggestion is that you try to connect your words, try visualizing your messages as a sentence without spaces (this doesn’t mean rush your message, rather humming it sorta). speaking from your throat also helps sometimes, though it gives a scratchy throat kinda sound when you speak