Questions on socializing young Cinnamon Queens

Our family bought a 10-pack of Cinnamon Queens last Wednesday. I’m no expert but from the research I’ve done they were definitely than a week on arrival. It’s been a week and one day and Google was not kidding about how rapidly they plump up. I feel like they’ve “changed” from lack of contact because their needs have been tended to, but I have to admit we’ve all been too busy to spend some playtime with them. They would kind of come towards humans the first few days but now they avoid a reaching hand like the plague even when I try to keep in mind not to grab from above since I heard they hate that. They’ll even give a wide berth to a hand full of crumble.

They’ve been inside a few days because the Texas weather got a little risky for such young chicks to be outdoors and I’m wondering if a transition of environment can make them more ornery. They’ve very rarely had short-lived episodes of loudly chirping in discontent but otherwise peep a normal amount most of the time. I know Cinnamon Queens are a docile, beginner-friendly breed so that especially means I went wrong somewhere.

What are some recommendations on getting them human-oriented? I’ve tried personally handling some a few times but I try to take no less than two since a lone chick taken from the rest just stands there terrified. Would setting an enclosed room and just letting them walk around and come closer on their own without chasing them help? Could I get a more shallow box to use as a “handling space” where I just sit close and watch over them for 30 minutes to an hour?