Sorry to hear you're in such ill health that you can't seek out an instructor!
I watched this video, and I think it's pretty clear. She has another one that shows additional stitches, but I didn't watch them. I learned to crochet without knowing how to knit, so the hardest thing for me was maintaining tension on the yarn. Hopefully that won't be a problem for you since you're already a knitter. Anyway, here's the link - good luck! https://www.youtube.com/watch?v=eqca00LdmAc