You don't have to focus on the reticle, make sure the eye bell (ocular end) is adjusted for you so the reticle is in focus, nice and crisp, make sure the eye relief, distance from eye bell to your eye is comfortable then just look through the scope at the target and both the target and reticle should appear be in focus then, when the moment is right, squeeze the trigger, Simples ! It's a good thing to train yourself to keep both eyes open when looking through a scope. Your non shooting eye needs a certain amount of light going through it to keep the shooting eye adjusted correctly and it also eliminates the strain of keeping one eye shut which helps. It takes time and effort but is worth it. Another thing, as your scope doesn't have parallax adjustment, keep your head/cheek weld on the cheek piece in the same position from shot to shot.
Remember, it is the strongest character that God gives the most challenges.