For decor, and this isnt your area of interest so you probably wont do it but I want to plant a seed in your head:
Think about fresh plant material, what you can get for free from around your neighborhood, and how you can use it in your space.
The great thing about fresh stuff is that you can compost it when its useful life is over.
My Christmas decor changes every year because I get bored doing the same thing year after year. Yesterday I set out to buy a small Christmas tree, but after going to three places and finding nothing. I came home, raided my basement, raided my neighborhood, and came up with this:
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Only the lights cost something years ago. That big wreath made of twigs cost someone something along time ago but it didn’t cost me a dime because DH pull that out of the dumpster for me. I have been storing it in the basement for a while but this year I want to use it. I think it will become a permanent item above my fireplace mantle with seasonal trims.
On the mantle piece are all kinds of greens I trimmed from our community garden yesterday: Bluespruce, Magnolia, lavender. The smell is heavenly.
I think Chicken Lady’s idea about fruit in a bowl is it is a good one. I completely understand if this crafting-with-plants has no Interest to you at all, but if you think of it as an artistic endeavor to develop, It might give you another hobby.
But I also understand that if you like the completely spare look of your space that is fine too.