DIY maxi skirt with yoga waistband plus a lot of other DIY sewing ideas. Sew one back seam only and use setting for loose and longest possible straight stitch to sew a narrow top seam, gather to fit and attach the yoga waistband with a straight stitch.
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dress, apparently its easy to sew: Its just 4 rectangles. Measure shoulder to hem length, then girth at widest part (hips?) and divide by 4. Add seam allowance. Sew allowing for neckline, arm holes. No pattern needed. 1/2 hour, max!