I would have thought you would need to know the basics of range and scope set up before you start shooting live quarry. Under the scopes screw off turret caps there will be adjusters, usually marked L-R and U-D. If you are shooting to the right you need to move the zero to the left, so you move the adjuster in the direction of the L arrow etc.
You will also need to know the effects of shooting targets higher or lower to your position. Untill you are comfortable with your gun setup, how it shoots, what holdover/holdunder you need to use at various distances in relation to your rifles zero I w