6.1. What should I do if I realize the Vatican II Church is not the true Catholic Church?
You must separate from the Vatican II sect completely — not out of pride or rebellion, but to remain united to the true Catholic Church that has preserved the unchanging faith of Christ.
As Pope Pius IX taught:
“It is necessary to hold fast to the faith of the Fathers, even if only a few remain faithful.”
Remaining in union with heretics — even materially — endangers your soul and leads to the loss of faith.