Help with ideas and colors.

Hi I’m gonna add some pictures of one of my living room walls. I actually purchased the bundle to add a brick wall to this area. Thing that I’m wondering is if the separate areas are gonna look right . There are 4 and they are 32 inches wide by 9 feet tall. 2 are 12 inches deep and 2 that are 15 inches deep. Really need opinions if the brick look will look ok. Also should I add the brick look to just the back wall or sides to? I’m also open to paint a different color. Walls are iron gate and the insets around the fireplace just seem off with the black. Also I plan on adding floating shelves to each area. Thanks for the help.

P.S These were designed for built-ins. Life happened! My husband recently had two strokes and we are in our dream house but money got tight and still is. They wanted $18000 to add the built-ins and it just couldn’t happen. Looking for a way to add a neat design without the high cost. Just wanted to explain why they are there. Plans changed. Thanks