She has promised that through the image of Guadalupe she will again crush the head of satan as she crushed the head of the serpent god Quatzlcoatl. And she will end the human sacrifice of abortion as she ended the pagan human sacrifices in 1531.
If you'd like to find out more about the Catholic faith you can call your nearest catholic church, I'm sure they have classes which you can attend to become catholic. Or, there is much information available from books or on line.
Best wishes.