I made the infinity dress mostly following the instructions on knucklesalad
. However, I thought it would be really useful to have a step-by-step, and the ones on Instructables aren't quite the same. The kind I make has a very useful component, the "waistband", which lets you wear a bra with your dress!
I highly recommend you make one or several, regardless of your previous sewing experience. As long as you have access to a sewing machine, this is a dress you can make in under an hour. And it's very comfortable and versatile!