I played V2 and the production was very good. The plot was also very good. Maybe it was a translation problem. Regarding the priest's place, I got stuck and couldn't find the cave where the priest and the stolen scepter were located according to the system guidance, nor could I trigger the mission to enter the mine.
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My first guess is that you've talked to a side character outside the church. You need to go to the building next to the church and recruit Noel. After that you can go to Rehling and remove the sign in front of the mine entrance. You can get to the area with the stolen Canoness' staff after exploring the mine.
I'll see if I can clarify this step in the walkthrough.