Welcome!
TTATT=The truth about the Truth.
A good resource for TTATT is www.jwfacts.com There are many sources as well, but this is a good start.
It sounds like you are already well on the road to understandng that. As pointed out above, being 15 and a minor under your parent's roof, you have certain obligations to them. I wouldn't necessarily be too vocal about your doubts...gentle as it goes. The key thing is, do not get baptized if you have even an iota of doubt!! You can still be shunned by individuals as a bad associate as an unbaptized publisher, but it usually won't be at the same level as if you were baptized and then DA'ed or were DF'ed. If you care about maintaining contact with your family and friends, take a very low profile approach. When you are in a position to be on your own, then you can fade and no one should be the wiser. Again, DO NOT get baptized...everything else can be dealt with.
Good luck in your search...