Do you actually NEED cushions on your sofa?

Get the pillow(s) from your bed that you use under your head when you sleep. Put it/them on the sofa for a couple of days to give yourself some neutral thinking time.

Best wishes.

I think you need more contrast and interest. Your best bet is to bring home lots of colors, patterns and sizes And return the ones that don’t work. Experiment until you find the perfect arrangement that also compliments your art (which I would lower)

I echo Maureen’s comments. Places like West Elm have pillows that mix and match well. And I would definitely lower the art above the couch.