I'm trying to make some convertible mittens and I'm kind of stuck on this part.
Flap: Cast on 18 sts to an empty dpn or the cable needle (if magic-looping). With same needle, and the mitten back facing you, wrist ribbing at the bottom, pick up and knit a stitch in 20 purl bumps on the back of the hand. Join and arrange these 38 sts to work in the round, 18 free sts, 20 sts on the mitten back.
I'm actually working with 33 stitches in total, so I cast on 16, and I'm preparing to pick up 17 stitches from the back of the mitten. I'm stuck on how to do this though. Do I take the working yarn from the cast on, and start knitting the stitches as I'm picking them up? I tried that, but it feels weird, and I would end up with the working yarn in the middle of the picked up stitches and the cast on stitches, so how would I join to work in the round? Or should I pick up the stitches first, then cast on? I'm so confused!