The hardest part of using the scope it seems to be (when teaching grandchildren and nieces and nephews to shoot) getting the correct eye relief. You can't be too close or too far away. The correct distance is usually around 3 inches. You should be able to see the compete sight window without a black shadowy ring. Try different distances from the scope until you get it down.
I agree with others that those scope mounts that allow you to use the iron sights are the hardest to get used to as you have to raise your cheek an awkward distance above the stock.
rifle & muzzleloader -- exhilarating
bowhunting -- obsession
reloading -- addicted