It sounds like you already have a good start, if it takes food from your hand. If it's doing that, it'll start sticking around to get more soon. I would suggest not trying to pet it until it is perfectly comfortable around you - touching can add a new level of fear, and you don't want to scare it any more.
As a word of encouragement, I don't bother trying to tame my Muscovies until they're around that age. And even though they're addicted to food by then, it still takes a week or two to build up trust.