I just got into working the Pro-Am stuff this year. I was actually very surprised at how easily the rules differences were to me. I was lucky enough to have outstanding partners who helped me alot, but I found them coming to me on rules interpretations many times. It actually was easier going into pro rules than it was for me going to NCAA rules from NFHS. We all just have our different niches. But, it is definitely a challenge and something you have to work on.
"control what you can control" -rules knowledge is one of the things you can control...I refuse to look stupid because I didn't know my rules