For the fireplace you put a sconce or two down on the wall as far as you can. You then place whatever it is you intend to put in front of it, table, counter, bookcase, Oggokian rocks, etc. I have seen a lot of people use the wine rack to give it that fire grate look. I did see reacently in someon's room picks where they used those Kaladim wall chains. I thought that was a very unique effect. When you come right down to it making a fireplace is more like making magic with smoke and mirrors. It's all an illusion on what you see.
In one Inn I used three scones with a Freeport counter in front of them. Then I used 2 ash bookcases to the sides of the scones and on top of the counter. I put a wine rack in front of the scones. I put a table on top of the counter with three more shelves on top of the table. The shelves were all turned so that you only saw the back sides.
I haven't gotten far with my other Inn room yet. For that I used the counter, scones, table, and placed an Oggokian chair on top of the table.
I was looking at screenshots of fireplaces yesterday and now I can't find them to link to you. Maybe I will come across them later.