That hat's adorable and you most likely won't run into any problems but don't let that keep you away from the forum. I did some cables to prove to myself I could but I've not made anything with them. It's the counting rows part that I see being problematic but I think I have the stuff to do row markers now so I guess I might run out of excuses. I think I should get the pattern Sue linked to and try it.
Happiness is catching that dropped stitch while it's still fixable..