Nice big area rug also

Hi. You have a lot of potential here and a good start. I don't know what style you like, but just showing you what art could do over your fireplace, as opposed to that mirror.

I would choose a lighter, perhaps white coffee table. Again, depends on your style and if there are kids around.

The firescreen is too busy for the brick and you and a rug would really pull the space together.

Could you show more photos of the room please? Thanks.

A large square coffee table for practical purposes as you have no other tables and suggest a light and airy design like below and accessorize. The brass compliments your mirror also

Not sure how far along you are or if you would like additional suggestions. Hope the ideas below help.

Accessorize mantle, as mirror needs some dressing up.

Light rug to ground room and add complimentary cushions

- A floor lamp, as it looks like you don’t have low lighting.

- If you can, it would be great to add shelving or framed prints above small cabinets on both sides of fireplace.

....As long as you create interest