He doesn't need Kaman or any of these other big men coaches. What he needs is mother fucking Dale Davis or Chris Dudley.
Forget all the shooting and other bullshit. It just isn't going to work out for you, man, because you are too weak-willed. You'll fuck it up, get down on yourself, and miss the next 10 shots. Low post, midrange, three pointer--it doesn't matter. This problem will never, ever go away. No amount of practice will improve your spine.
Learn to defend, be big and rebound a little. Dunk. Keep it stupid simple and you'll have a job in the NBA for the next decade. Hopefully somewhere else.