Sure, his trigger/muzzle control is suspect at times, but this kid, who goes by the YouTube name of RoyalNunsuch, has pretty much got a handle on a homebuild blowback action semi-auto 9mm Grease Gun remake that uses Glock 33 rounders.
She isn’t pretty, and there are some jams, but it’s only the second time the gun has been shot.
What were you building at that age? Heck I have a (semi-auto) STEN project that I have been circling back to for the past two decades and still haven’t gotten to the firing stage yet.
Those welds though. Hell, I know a hippy chick in Florida that welds better than that and she is in the business of selling empty boxes.