I always talk to my chickens before I open the coop in the morning, because of the window placement, they can certainly hear me coming, but can't necessarily see that it's me. I figure it might scare them to hear noise and commotion and hear the coop door opening if they don't know what's on the other side. Then when I give them food and water I just stay there, very still, close to it. The bravest one will come over right away, once one chicken trusts you the others will start to trust you more. The more timid ones will come over eventually. I just let them do their thing. Also when they are in their fenced yard I sit on the other side of the fence, calmly and watch them. They get used to me there, but I found it also had this other effect that my dog is getting used to hanging out by the chickens without getting all worked up. We sit there and calmly all stare at each other. It's a little odd, but honestly working. The dog doesn't try and eat the chickens or spook them anymore. The chickens don't run from me as much or run from the dogs. It's a win win. Now the bravest tries to see what I have in my hands and will let me touch her and often pick her up without a fuss. You will make progress. It can be slow, but I think if you can gain the trust of one you will gain the trust of all. My smallest is rightfully the most skittish, but she will follow the biggest bravest pullet anywhere and try and do whatever the brave one does. It's pretty cute sometimes. Good luck.