Beautiful sofa. Can you move the old sofa to the den? Consider moving the gray credenza to the wall where the mirror is and moving the TV to that wall and lower. Then you could have some art of the fireplace and a better view angle. A rug is needed to ground the space. I like the chairs in this inspiration picture but two swivel chairs would be good in your room also. The mirror reminds me of your mirror. I like the small round table for you and/or some c-tables. You will need some patterned/textured throw pillows, too.

well as far as I can tell the best set up here would be to put the sofa on the long window wall and flank it with the two chairs move the tv to te wall the table and lamp are on now. you can't afford to replace that center light fixture take it down and spray paint it satin nickel. otherwise, get a simple flush mount. get yourselves some baskets to put all the items in the bookshelf in or at least what will fit, that will neaten it up a bit.

I have a craft room that is separate, as well as sharing an office with my dad for college work. The desk in my room is more of just to have as a small workspace for anything I may want to do in my room…. If that makes sense

I need pictures of the space , do you already have furniture ? Where else could you put the TV like a different space where TV watching can be done when you have adult company and the kids want to watch TV. I really dislike TV in my entetaining space so we have a media room in our walkout basement . I need a bit more info please.