You have real good form. Eyes both open, good anchor position close to the mouth, body turned at the waist for good release.
The roght elbow does need to be lowered about 4 inches. I think you need more "cant or tilt" to the bow. This means to tilt the top limb to the right about 3 inches. This would also make the bottom limb move 3 inches to the left. By doing this, it helps you not only see the target better, but allowes you to kep the arrow on the rest a lot easier.
I perfer to shoot feathers rather than plastic vains. The plastic will sometimes cause unwanted kick in the arrow. This makes for an erratic flight pattern. They also tend to rip off the arrow because of hitting on the "rest" as you shoot it.
Every bow poundage calls for a specific "splined" arrow. If you shoot a 40 lb. bow, then you want a 40-50 spline arrow. If you are shooting an arrow to heavy (thick diameter) then you will most offten shoot to the left, etc, etc.
Get some velcrow strips with sticky back and apply the female (soft) sides to both areas where the arrow rests on your riser.
You will need to leard about the "judo" point. You have a great yard to shoot in and a judo makes target practice much more fun as you can shoot at leaves, pine cones, or golf balls and never loose your arrow in the grass.