There IS a lot to learn about operating in the 121 world. Some will be ready for it, some will not. The more right seat time you have in the operation, the better prepared you will be. No matter what, you will still see and experience things never seen before when you get to the left seat. As long as we are prudent and safe while figuring a few things out along the way, let it ride. However, some will not succeed and that is the nature of the game