@Amy2092 Accent color, wall art, colorful throw rugs are all great, but make sure not to "over-decorate". Guests don't appreciate knicknacks, they take up surfaces the guests could use for their own things, can get knocked over and broken, and are just more stuff to move around when you dust and clean.
When people use the term "minamalist decor" it conjures up visions of grey, black and white color schemes, quite modern, with large empty spaces, but minimalist can also be colorful, eclectic, and fun. Clutter is what you want to stay away from in an Airbnb.
Almost nothing in my guest room is something you'd see anywhere else, because it was either found in a second hand store, picked up on the side of the road on garbage day and painted up by me, collected on my own travels, maybe 40 years ago, or something repurposed, like a little pewter candleholder I use as a vase for a tiny bouquet of flowers and foliage from my garden. And I made the curtains, throw pillows, and patterned pillow cases myself.