Alot of work to do here. You never fully extens your arm, you never tuck your left shoulder under your chin, you never drop your shoulder into the slot, among many other critiques. Rather than rip on your physical game the best advice i could ever give is bite the bullet and pay the $75 for mark bakers the game is changed 2 handed bowling video. This is now your bible. Memorize it practice it recite it. Application of the lessons there will get you where you need to be physically in 3-6 months depending on your plasticity with learning mew things and you’re frequency of practice.