The sweet Pea Diaper cover is a quick (under 4 hour) project. Most of the project is completed using single crochet stitches. The Waistband and leg bands use Tunisian crochet, but don't worry there is no need to find a fancy hook for it the one you are using works great.
All the stitches are explained in the pattern. This pattern is made to have a high waist, and it is graded to have that perfect snug fit.