Here are a couple steps that may help you.
1. Place a cheek rest on the stock and get it set to the proper elevation. That means that when your cheek is on the rest, you eye is looking straight down the tube and on target. Do this on a bench, preferbly on a bipod.
2. Turn power down to lowest setting. Loosen the scope rings and move the scope closer or further away until the paralax goes away. You may need someone to help you move and set it so that you get it just right.
3. Sight in the scope. When aiming, do not look down the scope first. The first thing to do is to move the rifle into the position you think it should be aimed. Then look down the tube. Don't focus on the cross hairs. If you set the scope up properly with the cheek rest, the cross hairs will always be at the center of your focal point.
4. When a deer is walking through the woods, do not X it and follow until you get a clear shot. Rather, put it where you think it will go and wait till it gets on target for a clean, clear shot. This will help reduce the motion sickness.
Hope this helps.