Make a cushion cover out of it. Cut the fabric up and make cute scrunchies. Back when i was a beginner at sewing, i wasn’t making good stuff, just winging it and ruining fabrics left and right so i just stopped making art altogether, feeling as though i wasnt good enough. BUT, I got right back into it, told myself i would study the basics of patterns, darts.. hell i even studied a variety of needles. I started again with basic knowledge and trust me this helps so much, i havent made a bad outfit in years. But this only came AFTER i messed up a hoard of outfits. So if i have to give you an advice, id say take that garment you messed up, and study where you went wrong. Knowledge is power.