I just saw in a magazine, (HGTV Magazine) several ways to refresh/redo a room for under $50. It recommended things like painting or wallpapering one wall in the room, adding some floating shelves, starting with a BIG clean, buying some colorful pillows, thrift shop discovering a new piece of furniture and painting it, adding some books artistically stacked, a vase of flowers, and on and on. Use your imagination.
BTW on a final note, I mentioned Thrift Store Shopping, and I love it. I have kind of a farm house look and I use old milk bottles for vases and I put in both grocery store flowers and herbs that I grow in my raised bed garden. I have purchased old wooden chairs for as little as a dollar and have found them to be so versatile. Old frames are soooo cheep! They also are useful in many ways. You know that you can frame or just put almost anything up on your walls, right?
So, think about the future as a blank slate. Let go of bad stuff and let’s try it all again in 2022.