D.D.
There's an online group at ravelry.com, Free to join and there's a ton of patterns (free and for sale) along with examples of what the finished items looked like when made by other members.
Just a note that you'll need to make sure the yarn is super soft and no scratchy from the metallic part of the yarn. I've knit a few chemo hats and find that the softer the yarn the better. Also fleece hats are great too.