Salam. I have a question. I am in 8th grade, and I also live in America. The school I go to is a private school, and we have religion class there. Do you have any advice on how to stick to Islam, even though my head is being filled with Christianity teachings??
If you do sufficient work to maintain closeness to God, such as supplication, worship and Quran reading (30 minutes a day or more), then those Christian teachings will be a minor influence.
I recommend that you get Yasmin Mogahed and Tariq Ramadan’s books and read them occasionally, this will help you maintain your Islamic identity.