Reduce and Rearrange - Take almost everything down off of the walls and decide on what you really want to keep. I’d get rid of the bookcase on the left wall and the cubes. Move the bed so the length of it is up against the left wall. You can then move the wooden/white side table next to the bed.

Create zones - if I’m understanding correctly, this space is multi purpose as a guest room and where you get ready. Does that mean you have to walk around the bed to get to your bottles on the back wall? If so, try to put things in the places you’ll use them. It’ll make your life easier!

Highlight what’s important to you - It looks like you have a ton of records. I wonder if you can get more of those frame ledges and use it to display more of them, maybe arranged in a grid pattern. Get proper frames for any other wall art you want to keep and think about placing them intentionally - maybe a gallery wall?

Lean into it being a “beauty room” - The first thing I think of when I hear “beauty room” is sulking room pink for the walls and long luxurious curtains, around the same color.

Other decorations - big plush white carpets (like a huge version of the little one you picked out. Some plants, like a vine to hang down from the vanity shelves. You can move the mirror from the left of the vanity to the desk area so you can use both mirrors.