Get a good rest that really cradles the rifle. Start at 25 yards. Fire the rifle and move the cross hairs, not the rifle to the impact point. Fire a second shot and repeat. Move out to 50 yards and repeat. Really simple. You should be all set within 10 rounds at the most.
Freedom is not free. The best of us always leave too soon.
+1 on the boresighting & a good rest. The gun shop I use will boresight it for 10 or 15 bucks. If you buy the gun & scope from him, he does it for free. Maybe it'll take you only 10 shots if it's already close, and know what you're doing, LOL......