I think your on an information overload! Keep rereading the info you were already given and research "barrel turn" or "turning the barrel". That will keep you busy for months and help your understanding....
Definitely on overload but just trying to get a plan together. Did very well in All Stars and starting Middle School ball now. She one of only a few who could hit the fast pitching. I'm can't wait to see when it finally clicks. Clearly she is losing a lot of power without that full release. Tonight is a swim meet but we will be back at it tomorrow. That keep the barrel above the hands I think has caused issues. These great hitters clearly get it below their hands and fairly rapidly.