Hey! I too have some time on my hands, so here's some more feedback
The structure of your building is fine, but there are a couple of things you have overlooked. I don't know whether or not this is intentional, but there are no windows on the first floor of your church. While we're on the topic of walls, I'm also not too sold on the decorative walls behind the altar; I would probably have gone with something less attention-grabbing.
The pillar type you chose also strikes me as out of place. I recommend the marble ones (ID: 1515) instead to match the walls.
There are also several items that look somewhat out of place, but Xikini has already touched on most, if not all, of those, so I'll skip that. However, try to put thought into the objects you place. A splash of water probably wouldn't fit very well in a hellish area, and I for one have never seen a wagon stored in a church
I used the general layout of your building to make one of my own. This will hopefully help you get some ideas you can play around with.