Hi and welcome to Knitting Help! Thanks so much for not posting the entire pattern. It's very much appreciated.
Basically, you're going to pick up sts around the sole and continue the pattern up the sides. There's a video here for picking up sts
and another for working with two circular needles
that may help
The pattern wants you to pick up sts starting at the heel and continuing along the side and then some of the sts that are held out for the toe onto one circular needle. Then with the second circular, knit some of the remaining toe sts, pick up along the other side and finally pick up sts at the cast on edge (the heel). Then you can start the stockinette st on the 2 circulars.