I got the pattern from a German site...with all the cool sock yarns they have, the probably figure everyone knows the part about splitting up stitches, etc. (some kind of innate German knitting knowledge:) haha)
It looks like the part that goes around the middle of your foot is K1, P1 rib...then it switches to stockinette. Probably so it is a little more sung on the instep.
I am so excited you are doing this! :cheering:
Oh, duh, just thought of this. Let me translate
CO 60 sts, divide evenly over your needles (20 on each if you work with 3 needles, 15 on each if you work with 4) Knitting in the round, work 6 rows of K1 P1 rib, then switch to stockinette stich for about 2 inches. ETC, ETC. Helpful? Not meant to be anything but...I have gotten much better at decyphering patterns lately.