First step, pour the water out of your boots
This article was recommended to me. I just read it. It was maddening. About a woman in New York possessed with demons (despite, as the comical writer states over and over, her being sophisticated and good looking and white).
An aside: who is sophisticated these days (or ever)? I could expose that in two minutes.
So they're Roman Catholics. Not once do they talk about reading the Bible. They do talk about prayer, which is good, but you need the understanding that only comes from the Bible to know what to pray about, etc.
You can't be possessed by demons if you are regenerated by the word and the Spirit.
She and her husband say ritual and not sinning will get them through. Their ignorance of sin and salvation is at a cartoon level. Yet their main problem remains they avoid the actual living, quickening word of God.
They need to leave their demonic church, buy a real Bible (I'd recommend a King James Version), read it, get parts-in-relation-to-the-whole understanding of it, and put on the armor of God.
"Oh, my, I belong to a pedophile, Luciferian church, and I'm possessed by demons, and I don't know what to do!"
Take the obvious first step.