Scope choice FFP or SFP

[Gun Pimp]

It's not too difficult
If you're shooting at known distances - 2nd focal plane. With FFP you can end up with a very thick reticle on max. magnification.

Metric or Imperial? Maybe milradians if you were brought up with the metric system and you don't know what an inch is.

MOA if you're a bit older and into feet & inches - or you want to shoot F Class - the target is marked in half MOA rings.