Need help with props

Let me start this off with... before I got a HOTAS and VR I mainly played ARB at 12.0-13.3

Since I got the set up I've been playing low tier around 3.7-6.0 because I don't need as many keybinds and missiles aren't as fun in sim to me.

I can fly pretty good and I feel comfortable with the controls of my planes but I can't seem to hit anything. if they're flying straight and not moving, I hit maybe 4 out of 10 shots but if they are turning I miss everything.

I've tried setting my VR up so I sit higher in the cockpit and can see over my nose but that don't work. I've tried setting the range of my guns to 400 instead of 800 thinking it was that but still nothing.

Is it an experience thing and I just need to keep at it to get better or am I doing something wrong?