Eileen,
I sent you an email yesterday (or tryed, I was having 'puter issues) Anyway yes I think a practice run with the stitches is a great idea but I believe C5 is the single blanket stitch and C6 is the double blanket stitch (sews over the stitch twice laying down two strands of thread for a more pronounced stitch) I think there are several others that would work beautifully as well. Hope this helps and I am sorry it took so long to get back to you.
I know what you mean about all those stitches I have been a little overwhelmed myself

Let us know how it goes for you, please.
Peter