jake, agree with shooting Groundhogs. I'll add Squirrels (with .22) to the list.
It's repeated and may sound corny, but shooting practice pays off. Confidence is gained when one becomes familiar with rifle, trigger pull, scope, loading & unloading.
Squirrel hunting with .22 has honed my rifle shooting skills. I've felt cocky and confident looking at the crosshairs. jake, so I know what you are saying about taking a head shot.
But I still pass on head shot Canines. I go for the larger target.