Chicks are generally fully feathered by 8 weeks so yours should be alright to go out then. We have a house chicken who is a Silkie. They are very fun. They're not like other chickens, more like fuzzy clucking slippers.
Mine will jump up on the couch and nap on my feet while I watch TV and has even slept in my DD's bed with her. MY chickens are way more personable than my ducks and were raised the same. Mine run to the door of their pen when they see me coming. They all squat for a back scratch and don't mind being picked up. If I sit down one of them will jump in my lap. They each lay an egg every day. I like both the chickens and the ducks. If I had to choose it would be chickens because they are easier to take care of.