This is a quick tutorial on how you can hold a crochet hook one-handed. I’m lucky enough to have a little strap to help hold the crochet hook to my amputee hand but this video shows how you can hold the hook against your knee, which will also work against a different surface.

You can see the full granny square tutorial and how I hold the hook with the strap: https://www.youtube.com/watch?v=sQ-2SZNS6R0

If you would like to learn to knit one-handed:
Casting on one-handed – https://www.youtube.com/watch?v=r6OyU0SM5rs
Knit stitch one-handed – https://www.youtube.com/watch?v=JFajvNUzgPo
Holding yarn & tension one-handed – https://www.youtube.com/watch?v=zPRtTgZZ7kg