I would be more confident in him being ready from the jump if there was more info on him, more buzz, and a higher ranking. This stuff doesn't happen in a vacuum, context matters. If a bunch of knuckleheads on an internet sports forum look at some old video and think he's ready to go, then scouting services would be all over him as well as other coaches. Athletic 7-ish footers don't grow on trees. Think Chet Holmgren at one end of the spectrum, that kid was ticketed for the NBA from his sophomore year (even if every time he jumps, I think he's going to break both his legs when he lands). Lydon was kind of under the radar, but he played in a tough league, was a top-100 recruit, and had a pile of high D1 offers.
Carey has potential, no doubt, but there's a long way to go here.