Debbie Bliss Garter Stitch Booties HELP!

Trying to make my first pair of booties:) I don’t understand the pattern directions:
“With right side facing, rejoin yarn at base of instep and k up 12 sts along side edge of instep, k across 12 sts of instep, k up 12 sts along other side of instep, k rem 12 sts.”

Prior to these directions, I had shaped the instep by K24, turn, K 12, turn, K 24 rows on this set of sts only. Break off yarn.

What i don’t get is this-do i pick up the stitches along the side of the instep first? And then, do i knit across the top piece & down the other side of the instep though it says to knit up that side??

thanks in advance!

Yes, ‘knit up’ means the same as pick up sts. You start picking up along one side of the instep, knit the 12 sts that you were knitting on, then pick along the other side and there should be another 12 sts to knit along the other side.