The wall looks like a pretty coral and seems to go well with the vase on your countertop. The rug looks like a rusty brown. I think you should get a taupe rug and not one with a geometric design. I would lower the shower curtain a little bit.

Oh, paint the other walls.

If you are going to have a shower curtain, I think the room looks much more finished/polished when it goes all the way to the ceiling. I would recommend a rug that brings in the other colors used in the room in a very subtle way. Perhaps delete the toilet seat cover for a more updated look.

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Fleming Guest Bath · More Info

I really like the beautiful orange color that you are using. It really gives a great jumping off point for your art work. I'm not sure what your taste is in art, so I will give you an example of what I might choose. But know that it is the color combo that I am suggesting. Art is very personal so you can find this color combo in art that is more suited to your particular taste. These pieces were found on Wayfair. Choose a color that is in the carpet you choose for your towel color. I would keep the towels plain as you will have plenty of pattern going on between carpet/art work and shower curtain. Please post photos when you are done!