What does it say to do after casting on to the needle? You might turn in which case it would be better to turn first, then CO the sts using a knit or cable CO, better than using the backward loop to cast on at the end of the row. If you don't turn, use the knit/cable CO anyway, and maybe you join with another part of the slipper. When you read ahead in the pattern you get an idea what comes next.
sue- knitting heretic