Hi HannahMcManus (HM) and welcome to JWN!
I was about your age when I started waking up to the real truth about 'da troof'. I didn't argue with my parents although I did point out a couple of things that weren't Bible based (like refusing to go door-to-door pushing the ragazines being a risk to my eternal life and salvation ).
Because you are still living in your parent's home you will still have to live by their rules. Even though I knew there were issues with the Watchtower and JWs, I continued to attend the Bible book study we had on Sundays at our home. This actually gave me more information to see how wrong it all was/is. Luckily, my Dad wasn't really into the cult at the time (when you have 2 jobs you have no time to dedicate yourself to a cult that expects you to work for no pay).
Here's what my strategy was:
1) Put together your life plan. Keep this to yourself for now. Decide what kind of career you'd like to have. Once you graduate high school, move out and go away to College.
2) Get real busy! I got a part-time job and prior to that I took any and all babysitting jobs I could to get me money that I could put towards my post-secondary schooling and also to get me out of the house and away from pressure to do cult activities. Between my jobs, my farm chores, and my homework from school, there wasn't any time for extra cult activities other than the once a week Bible book study. I also paid my Mom $50 a month in room and board after I got my job.
3) Get a hobby or 3. It is good to have fun in life and at the same time, learn something new.
4) Get your driver's license. This facilitates your freedom.
If you'd like to do more research on the Watchtower, one website that I have found to be excellent is the JW Facts website at: www.jwfacts.com .