I think this is a great opportunity to deepen your faith. Take each specific claim made and research it, for example the corruption of the New Testament. Just quickly, the earliest writings were perhaps 10 years after Jesus’ death and ressurection. They were the writing down of an oral tradition- a re-telling of the Gospel that was well known, we understand this from the four different Gospels, especially the Synoptics- Matthew written for the Jews, Mark for the Romans, Luke for the Gentiles. John came later and is a different kettle of fish.
If you heard the story of Jack & the beanstalk and someone changed it, you’d know and probably pipe up and say “that’s not the story I know”. Scholars would agree that even more in Jesus’ time, a passing on of news had to be accurate. This is particularly evident in the use of the very words of Jesus contained in the Gospels (like where he exclaims in Aramaic and it is retained as Aramaic).
If you have specific questions about the claims of this cult then please do not hesitate to ask.
In the meantime I would recommend some broader reading, Truth and Tolerance by Cardinal Joseph Ratzinger is a great place to start as it offers an important overview regarding the truth of our faith in the context of other religious beliefs.