Posting Up and Layups

Today after basketball I had Cathy Peterson stay behind and give me a quickie basketball lesson. I kinda get the basics of posting up and layups but never really try to do them. She was having me post up on the hoop side to get passes up over the head of the defender and get an easy shot. I really want to be able to post up on the other side and turn and shoot but I just can't do it. As far as layups go, I was almost starting to get the hang of it. I made like five in a row and then I had Cathy halfway guard me (like two feet away, not anywhere near close enough to actually get the ball), and I missed every time. D'oh.