I'm not going to weigh in on the indoor or out door thing, except to say I wouldn't personally do it. It does sound, though, that you may have some misconceptions, about chickens, and also the traditionally kept "pet birds". It sounds as though you want a bird that will be friendly and cuddly. I've had many pet birds in my life, as well as 9 years of keeping chickens. Here's the thing, none of them, domesticated or not, come sweet and cuddly. You have to put in time handling and building a relationship, whether chicken or parrot.
the sweetest, most loving bird I ever had was a cockatiel that I hand raised from a week old. She was so bonded to me that she knew the sound of my car in the driveway, and would call for me whenever I left the room.She loved to be handled, and have her head scratched. I've had birds that were friendly, and others that would panic when I approached. Same with my chickens. They will run to me when they see me, looking for treats, but few of them let me pick them up, and I don't think any of them "enjoy" it. Chickens, and birds in general, are still a prey species, with prey species instincts. "domestication" in chickens is not the same as dogs. You might be better off with a small handfed parrot type, they do form strong bonds, that are not all about food, unlike my chickens