Good ideas on the magnification. Set that bad boy around 15 power unless you shooting one static target from one position (KYL Plate rack for example).
My biggest improvements came from me getting off of my stomach and shooting from all kinds of different height barricades. Dry fire is super important. My thought on this is that if you sneak in a hit from a bad trigger pull, you won’t improve. It’s not nearly as fun, so live fire too of course.
I got a game changer bag that I used to hate using, and now it’s the only thing I use. Put it on railings, barricades of all heights, and measure your scope wobble while pulling the trigger dry firing. If it’s always on the target, you’re good. Just keep playing around with positions until you can get stable. The speed will come with practice, but get your hits in before you focus on speeding up.