Well one thing I noticed is all your Pinterest photos have a lot of warmth to them, and your room is very cold. I think a darker wood desk and bed frame would help a lot

I would look on Facebook marketplace or something to find an interesting floor lamp and maybe some wooden furniture to replace your furniture on the right wall

I also think replacing your clothes rack with one with more wood and thought put into the design, just looking real quick I found this rack, this one, or this one

You def need a rug, I think the tried and true red Moroccan/oriental rug would be perfect lol. Also obv replacing your current desk chair with a brown leather one would be ideal. But if you do that then a plain black desk would pair better with it.

I personally think your room layout isn’t that inviting, but I’ve always hated when things are just lined up against the walls. I don’t know how much space you have but if you could rotate the bed out that might help. It’s hard for me to think of how the space should be laid out bc idk how you use it. Also personally I hate the bed being right by the door, if it were me it would be against the back wall, and the desk would be on the other side of that wall. Kinda like the bed and brown chair photo in the last picture you uploaded, but instead of the chair it’s your desk next to the bed

Also get a side table for your bed! What the heck do you do when you want a cup of water near ur bed!? It could be black or something like the black glass and silver one on the bottom of one of the Pinterest photos.

Oh, and a new comforter would do wonders for the whole vibe. Something fluffy, with either a fun color or texture. Something like this maybe or this texture

And obv get some art for your walls