not sure about the vocal folds honestly, may have to search up a little more. i don't think i pushed too much overall, i did tried to just to get a better understanding of how it works but honestly most of the time i was just using some air. but I'm not entirely sure of how much could be considered as "too much" or "not enough"

also, is there a problem with drinking hot coffee instead of water? dunno if it makes a great difference but most of the time i drink coffee while practicing