You mentioned that family came first, if I understood correctly (your English is great, by the way). If you question the beliefs you may not just end up shunned by the congregation, but by your family as well. You're young, and have a lot going for you. I think if you go down that path of questioning openly you could cause unnecessary distractions for this pivotal time in your life. You don't have to burn it all down if you have opportunities afforded to you by what seems like a very different JW existence than most. We've only seen but a fraction of your story above, so clearly we can only advise you so much, but it doesn't sound like anything is pushing you right now to burn it all to the ground.
Oh, and welcome to the forum, from an atheist no less. ;)