I will offer the same advice as Two Crows. Sit down on the ground, on a comfy cushion if the ground is too hard and dirty for your taste, and let the chickens come to you at will to take treats from your hands.
Type of breed matters, though. While my Orpington, EE, Cochin, Brahma and two of my Welsummers are hug hogs, my other chickens are stand-offish, especially my Wyandottes, who loathe to be touched by my hands, although they will perch on my legs.
It's never too late to start establishing trust and closeness if that's what you want. Be patient. It takes time.
Agreed with both the above......besides, there is no such thing as a bad time spent sitting quietly with your flock.