Shetland triangle shawl from wrap style - Help!

I am confused by the first set of instructions!!
first you knit 6 rows of 2 stitches then this -" K2, rotate piece 90 degrees clockwise, pick up and knit 1 st in each of the 3 garter ridges along selvedge of piece, "

I can slip a stitch thru the garter selvedge, but how do you pick it up and knit it?? any link to tutorial on this site that would help?

Thanks in advance…

Picking up a stitch the way you’re doing it is the same as ‘pick up and knit’ the stitch. Just pick them up through the edge and consider yourself done with that direction.

Thank you, you are always so generous with your advice! I think I can do it now!!!