BlackWolf, you are amazing. Stay strong and stay calm. You will make it through this.
Thousands of children and teenagers are facing the same pressure as you right now. The WT is hitting your generation with double barrels these last two weeks before the RC starts next Friday. It's despicable.
You have gotten some great advice already. Rather that try to criticize doctrine, I agree with some who have urged you to emphasize the parent daughter bond. Reassure them that you love and respect them.
Regarding baptism, it might be best if you use the current study articles to your advantage. I can assure you you parents are studying them extra carefully this week, looking at ways to "encourage" you, like they did last week. You need to study it even harder than they do, so you can convince them that you have given it serious thought and that you know you are not ready. It is easier to buy a few months than to buy two years.
Tell them you read the article and found there is a ton of suggested reading and you need time to fully digest this rich spiritual food from the Slave. Ask them to let you spend Saturday in deep personal study, so you can ponder this decision, which the most important decision of your entity life. Be really serious. They might suggest that you stay home from service to do it. If so, it could give you a breather. There is also plenty of material there to help you show that you are not ready for baptism this summer.
To keep you parents from flipping into cult mode, stay loving and respectful, and avoid anything that could remotely sound apostate. If you dad insists on studying with you, do not argue with him. Put the burden on him to explain things. The toughest and most indefensible doctrine is overlapping generations. There is no way a generation can last 120 years. If you can find a way to do so respectfully, ask how long your great grand parents lived. That's four generations.