Alas, a video will give you a very basic understanding.
Myself, i was invited to a winter match by
@JEFFPPC .
Took my wifes Savage 110FP in 223Rem and entered in factory class.
Rifle shot fine & i managed to get 2nd in Factory class.
Realized quickly that my optics was very much a limiting factor.
I was using a 4-12X42 Vortex Crossfire II.
Next match i upped my optics to a Sightron STAC 4-20X50. But the yardage was further too. Still couldn't see bullet holes beyond 200 yards.
Finally got a used Sightron SIII 10-15X60. Now i can see the holes. They just aren't where I want them to be.
I essentially did this approach for my first F-Class match.
Got what info i could & signed up for a match.
First time shooting prone.
First time shooting 600 yards.
I was in F-Open with a mostly stock Stevens 200 that i reamed to 7mm-08AI.
Both experiences were a blast!
And i met some great people!