I have questions, my baby grey comes home tomorrow I was told to keep her in her cage the first day

Also, I was told the she should be in her cage most of the day, 20 min. out in the morn, 20 in the afternoon and a 20 min. before bed. Anymore than that will cause her to have cage issues. Do you believe that? She has a pellet mixture (Zieglers & Higgins pellets) for the day, veggie mix for night. What do you think of the diet? I was told I can give her some fresh veggies and a small piece of fruit each day. In the afternoon she can have a piece of spray millet. This is what she's been eating. She still gets one syringe of baby food at night. I'd like to get her eating an all organic diet as described in Alicia McWatters, "A Guide to a Naturally Healthy Bird: Nutrition, Feeding, and Natural Healing Methods for Parrots." Heard any good things about her approach? My baby grey has been off antibiotics since Monday. Should she see an avian Vet before bringing her home or should I give her some time to get acclimated to her new home first? I just want to do the best or her. Thanks

Our Congo was out in the morning, and again all evening as a baby, as soon as he feathered out, with several noon 'nap' hours. He wasn't allowed to roam freely because we knew he needed discipline to be safe, but we think that outside stimulation made him more of a family bird. He's two now, and we can lay him on his back and cover his breast bone in raspberry kisses, and tickle him, and hang him from one finger while kissing his beak. He knows how to have fun in his cage, and he does not have a squawking problem. It seems like lots of people think that birds must be treated a little icily, but you and I know that we wouldn't treat a child like that, and a bird deserves no different.