Hey manwithnogun. :)
First of all, congratulations on learning about Islaam. Without a doubt, it is the true religion which every child is born into, then his/her parents make this child turn into a Christian, Jew, Zoroastrian, etc. As the Messenger of Allaah (peace be upon him) rightly said.
In regard to your situation, you can either:
1) Tell your parents the truth, that you do not want to become Christian, and that you do not believe in it. You could even ask them questions which you don't understand, to make it clear to them that it does not make sense to you.
2) You could stay quiet, and keep your faith secret.
Let's look at the following verse (translation of the meaning):
Any one who, after accepting faith in Allah, utters Unbelief,- except under compulsion, his heart remaining firm in Faith - but such as open their breast to Unbelief, on them is Wrath from Allah, and theirs will be a dreadful Penalty.
[Qur'an 16:106]
Ibn Kathir, a famous commentator on Qur'an states;
The scholars agreed that if a person is forced into disbelief, it is permissible for him to either go along with them in the interests of self-preservation...
From the above, we see that a person is permitted to hide his/her faith if they feel under threat, i.e. if they will receive torture for making their acceptance of Islaam apparent.
However, a person can also make his/her Islaam apparent, and refuse the other religion.
Ibn Kathir continues;
...or to refuse, as Bilal (a companion of Allah's Messenger) did when they were inflicting all sorts of torture on him, even placing a huge rock on his chest in the intense heat and telling him to admit others as partners with Allah. He refused, saying, "Alone, Alone.''
Similarly, when the Liar Musaylimah asked Habib bin Zayd Al-Ansari, "Do you bear witness that Muhammad is the Messenger of Allah'' He said, "Yes.'' Then Musaylimah asked, "Do you bear witness that I am the messenger of Allah'' Habib said, "I do not hear you.'' Musaylimah kept cutting him, piece by piece, but he remained steadfast insisting on his words.
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SOURCE]
Musaylimah was a false and lying man, who also claimed to be a Prophet at the time of Muhammad (peace be upon him) - the true final Messenger of Allaah. Musaylimah would slice a piece off Zayd Al-Ansari, each time he denied that Musaylimah (the liar) was a Prophet. Zayd died as a martyr, God willing - because he remained firm upon the truth without giving up his religion, even though he was severely persecuted.
Know that your family will not be with you on the Day of Judgement, when every soul Allaah has created will return to Him. Allaah says (translation of the meaning):
One Day every soul will come up struggling for itself, and every soul will be recompensed (fully) for all its actions, and none will be unjustly dealt with.
[Qur'an 16: 111]
So even if your family gives you a hard time, know that they cannot harm you or benefit you except by Allaah's will. And He is All-Aware, and the responder of those who pray to Him, at times of hardship and ease.
Pray to Allaah to provide a way out for you from this hardship, and we will do the same. You could ask your parents to maybe delay this, telling them that you do not want to be a hypocrite. Maybe as time progresses, Allaah will open their eyes and make them abit more relaxed also? And this might be the time when you can gradually show the goodness of Islaam? Maybe through time, Allaah will open their heart to it also?
Right now, just pray to Allaah because He is the responder of prayers.
When My servants ask thee concerning Me, I am indeed close (to them): I listen to the prayer of every supplicant when he calleth on Me: Let them also, with a will, Listen to My call, and believe in Me: That they may walk in the right way.
[Qur'an 2: 186]
Place your trust in Allaah, and know that nothing happens except by His decree. He is the All-Knowing, All Aware. And He is the responder of prayers.
Peace.