Lots of shower curtains and bath accessories to choose from on Target website. Also, as posted above, lots of wall decals out there these days. Go to wayfair.com for lots of selection.

Kittrich have a great variety of wall adhesives that are removable

Oh my! You must need more workspace in that tiny kitchen. How about a black & white color scheme with yellow accent, which would be easy to change up when ever you wanted. I would suggest a small black counter height table with at the very most 2 chairs. Some modern bar stools in a bright yellow & chrome would look very sharp. Then accessorize in yellow. How much space is in the corner by the sink and what are your thoughts on what you would want there? An apartment size dishwasher probably could be installed or maybe a knock out shelving unit for cookbooks, appliances, etc.
I would then put a modern round table in front of the window in the living room and have either shelving or a china, liquor cabinet on the long wall, where you would still then have room for your sofa bed and modern end tables. Hang the TV on the facing wall with a media unit underneath. I have seen some very nice fireplace media units that would look very nice.
In your bathroom find a black, white and yellow, or any print shower curtain you really like and add towels, etc to cororrdinate.

Can you put
Some
Pictures
Up with curtains do you would suggest this way i know where to buy the product

aria Scazzero
I went to ikea
And got the cool
Black
And white shouwwr curtain with the shapes, red
Rug, red and black hand towels
Over eachother. Any other suggeations the toilseat cover i would do black.
I hate the lights i want to
Spice it a bit any suggestions