As a non JW who dislikes the leadership of this religion with a vengeance, I wish I could be in your position so I can ask for a Bible study and have lots of fun asking them hundreds (I meant hundreds) of tough questions regarding their leaders and their doctrines of the past and the present. I can't do that anymore because I am a well know friend of the "apostates".
If you are not depressed, not socially needy or awkward, not a 12 year old or younger, not completely ignorant of the world around you, don't have an IQ less than 90, have a low level of education, then your chances of beeing sucked in are very tiny. I don't know much about your son. Something was certainly missing when he was fooled by this religion. You would know better.
Take a Bible study and have fun. Just be cautious not to let your teacher know that you know too much. Pretend, as they do.
Regarding getting your son out. Come to this blog often. You will learn about the religion more and more. The insight you get will improve your chances to get your son out.