Nice room! I'd first address the furniture arrangement. Is there a reason why the sectional is pushed all the way into the corner? Your side table looks fine but you need a more substantial lamp. Can you post pictures of other views of the room?

It’s pushed to the wall because that space is not usable. I’m planning to add couple more of the same big pillows to that side.

Heres another view before I added the single seat. I can post more when I’m home.

Here’s another pic.

I believe the “rule” is to use 75% of the width of the sofa for artwork. I have always just eyeballed it, sometimes using pieces of kraft paper for multiple art works and taping them to the wall to judge the finished effect. Saves making dozens of nail holes. Hope this helps.