Real talk, you'll get a little better every class.

At a serious school with decent competency around you'll be 3-5 years until you are one of the adults in class. That should be around late blue or early purple belt. 10 years of regular training for a black belt.

It isn't some weird elitism either. There really is that much depth to the sport. As an athletic dude it'll probably take you a year until you are really doing the sport and not just fighting every roll. After that you actually start to learn.

TLDR, go do it. I hope to see you on the mats one day.