Interesting! I’m an older trans gent and I learned most of my masculinization technique from just watching (and emulating) how dudes talk while playing video games.
I suppose as a tip; using fewer syllables and clipped, stoic language helps. If you find yourself sounding a little rude, that’s technically the point. Also the end of masculine sentences dips down instead of up (in the US at least).
Best of luck friend!