Full skirts and their infinite variations can be the quickest and most satisfying sewing project, whip-uppable in under an hour. That is, once you've mastered the basics that make up a skirt's skeleton, namely inserting an invisible zipper which we've already covered here, and attaching a waistband. The following tutor
How to take in trousers at the waist - The Sewing Directory
ATTACH FLAP SKIRT
Tessuti Multi Elastic Waist Skirt: A Sewing Tutorial - Sew Tessuti Blog
Picking up slack: how to repair broken elastic, Life and style
How to sew the perfect waistband – By Hand London
How to Sew a Waistband – Easy Tutorial – Zune's Sewing Therapy
By Hand London Hannah Wrap Dress – Kate Eva
Charlotte Skirt Sewalong #4: the waistband – By Hand London
Sewing Pattern Roundup: Pleated Trousers - Emily Lightly
Pattern Review: By Hand London Sandeep Dress - Threads
By Hand London Hannah Wrap Dress – Kate Eva
Assignment: Kim Dress - Sew Sweetness
Tricks for sewing perfect waistbands - The Thrifty Stitcher
ATTACH FLAP SKIRT