Sit down on the ground with them. Play games on your phone, read a book, just sit still, then put treats around you (the way to a duck's heart is FOOD) and just wait. Before long they will be crawling all over you. You might be able to touch them then.
As I say, mine are still skittish, I just keep working with them. Good luck
With my Runners, this is the approach I have taken, and while some still don't like being touched, all of them will gather closely around me, standing on my feet, leaning on me, sometimes picking my pockets (the reason I don't carry metal objects that are small enough to swallow in my pocket.
I have a few huggers, but no one likes being picked up. So I just squat down and give'em gentle ducky hugs around the shoulders. Sometimes I can even sneak a kiss on the back of their necks.