Gosh buddy, I can see you are frustrated. I want to help where I can. I hated the Mustang for a long time and I started just flying with no combat for a long time. I learned how to tweak the manifold pressure and RPMs to get max performance. I don't know how I can help now but maybe I can put some notes to together.
For me, and this is just me, I had to learn how to fly the airplane before I could move further and I am still a nugget. Hang in there, you will will excel. PM me anytime. Great avatar!!!!!!!