Find the nearest club with NRA mid range prone or long range prone matches and enter your rifle in F class, F T/R if your rifle is a 308 or 223, F Open if it's anything else.
Make sure you let the match director know if your rifle has a muzzle brake or suppressor. Muzzle brakes and suppressors are not allowed in NRA rifle matches but some match directors make exceptions for club matches. Or take the brake or suppressor off and shoot with a bare muzzle.
You'll get 40 to 60 shots on paper at distances from 300 to 1000 yards, depending on the match format, and like you saw in the video you'll learn quite a bit more detail about what you and your rifle can do.