You will need to do some research to help your 12yo by the sounds of it.
btw, I absolutely agree with jwfacts on this one... your lil boy will find your move away from the org very difficult to deal with, after all the years of WT indoctrination. It's going to be really important to help him with beating the indoctrination through thorough research that proves as we all know that the FDS aren't who they say they are, and to point out all the contradictions in the teachings and in their lack of love and humanity to those both inside and outside the org. No doubt this process will also help you to cement why you've made the decision you have :)
luv frog x