I crochet, I could give you some tips.
I make pouches
and I want to learn to make some other things, but I need left-handed patterns. LOL
I use Bernat blanket yarn, it's very similar to fleece and has been proven safe when crocheted with tight stitches and checked daily(as all pouches
should be). Amanda Miller uses Polar brand fleece yarn when she crochets and Jessica Surratt takes regular fleece, cuts it into 1/2"-1" wide strips and crochets it that way.
We've all got out own styles.
As far as I've been told; no Knit stitches are safe. But crochet, when done correctly is.