Step 2: Make a lining
I'm sorry I don't have instructions to make a lining, but here is a Youtube video to do exactly that:
DIY Skirt with Elastic Waistband
Make sure, if you follow the directions to the Youtube video, that you make your skirt WAY too big for you and you don't attach the elastic (just yet). Mine was probably the size of my waist plus 12" or so. You could also use a simple skirt pattern.