how to knit a dutch heel

i am knitting a very thick bulky sock I casted on 36 sts and now at the heel the stitches are divided to 18 on each needle i want to do a dutch heel but am uncertain how to work on 36 sts please help

You’ll begin the heel flap and turn the heel using only 18sts. The instep sts will sit out until the heel is finished then be rejoined to the heel sts to continue working the foot of the sock. Here’s a nice tutorial for the dutch heel: