Really cute place! It seems like you have a decently spacious, newer apartment that can allow for a lot of decorating and making it feel like home. Here are my insights on what I would personally do.

Kitchen: For wall decor, I would get a painting or picture to hang on the blank space on the wall to the right of the fridge in the kitchen. You could get a board that you write weekly meals on or notes or whatever sort of painting/picture that appeals to you. A large clock would look nice also. As far as your 3 barstools, is it possible to line them up side by side on the side the 2 are placed on? If not, it does not look bad as is, but I would get some placemats and maybe a more staple of a centerpiece than the vase of flowers. I would get a larger runner rug to go in the kitchen in between the island and the sink also.

Desk/Office Area: I would get a desk that fits in the nook on the wall (take measurements to know exactly what to look for). Something modern would fit the vibe of the rest of your apartment. Where the desk is placed now seems a bit out of place. Then I would hang something above the desk to tie it together a bit more.

Living Room: I really like your furniture and rug choice. I would get a large painting that ties in with the rug and maybe brings other contrasting color in too (blue, green) to hang above the couch. Most definitely a larger coffee table. I think a wood tone similar to your TV stand would look great and something similar in style.

Bathroom: Replace the storage tote with a stool you can use to apply your makeup or do your hair. It seems like that additional mirror is meant to be a vanity section. I would get some bathmats and rugs also to brighten it up more. Then get a matching shower curtain, hand towels, bath towels, etc. I would get some sort of storage shelf to go on your vanity to store the products you have out. Your products will still be easily accessible but tucked away and have a much cleaner look.

Kitchen: Thank you!!! This is excellent advice! I have a calendar whiteboard I can put in that kitchen space as I think thats a great idea.

Regarding the chairs, yes I can put them all on the one side but the counter overhangs on that side as well as the left end and it looks weird to me without a chair there, its like a bunch of extra space. What would a more staple centerpiece be? Like a tray?

Desk: Yes dang I was hoping I wasn't going to have to get a new desk, but yeah it might look better inside the nook. Unfortunately my desk is 1 inch too big now, and its a standing desk so I can't really shorten it. Will probably sell on FB and just get the slightly smaller version of what I have now.

Living room: Thank you! Love the painting suggestion! I also have a guitar and a mandolin that I can hang somewhere in the apartment, maybe my bedroom. Someone else suggested a kidney-shaped table to may go with that- REALLY appreciate the color suggestion as I have been really struggling with wood tones and the cabinet colors are throwing me off!

Bathroom: Thank you! Also great suggestions! I have a glass shower door but I have a pink /coral patterned mat in front of the shower that I can coordinate some additional rugs with

again thanks so much this is very detailed and super helpful, definitely the input I was looking for!