LOL, BLprkfrnks, that was funny.
JH,
Kudos to you for coming here with your concerns, you seem like a very mature young man. My son was asked last year to work for a friend who began a gym and needed pitching instuctor, he thought about it and turned it down, partly because of some concerns that you have, another part is because although he was a pitcher, he didn't think he knew enough to instruct properly.
But you seem to be well prepared, and IMO, it is you that has to instuct with an approach that in a way you feel comfortable. Not to get into the pros and cons of throwing CB's early, at 11, the FB and then the CB should always be first consideration in the game.
Some good points, teach him to throw it properly, there is no harm in suggesting he shy away from it until he develops a better FB, then a change up. I am sure that you will do a good job of educating the dad, which would include the pros and cons of early FREQUENT use of the CB.
JMO.