Work the increases at either side of the front 4 times and on the next knit row, cast on 6sts. So you'll have your sts (70sts at this point) on the left needle and you can use a knit cast on
to add 6sts. Now knit those 6sts and continue on around to the other edge and then join to work in the round again.
You were working in the round on the lower part of the hood and put 10sts on a holder for the face opening. Now you'll be back working in the round and casting on 6sts over the upper part of the face opening.