I don't have cockatoo experience, well I worked part time in a bird store once does that count
But I do have a few months of young macaw experience
Man it's been a rough learning and settling down period. I love Perry to death but boy she is crazy and always on the move! When she first came home I had bad anxiety, which I have never experienced before... She screamed a LOT while she was in her cage and that made for unhappy dogs, grey and husband. She flew like a wild child (still does) all over getting into things, knocking things down
. She tossed her food out of the bowl and would crap while hanging on the side of her cage, total opposite from my easy going, clean, good boy Babalu. It would take me like 30 mins just to clean her cage every day
While things are 85% better now, if I knew now what I (we), would have to go through for months to get to this point... I'm not sure I would do it again. A big bird changes everything!
She is a lover though, and would rather be on my shoulder cuddling or on my lap wrestling with a towel, then on a play stand or her atom. She goes through a lot of food/nuts and toys! X4 the amount of my grey
But the love and affection and silliness she gives me has made up for all of this
My experience will prob be different than yours if you are adopting, as you will prob get an older bird than mine. Just be prepared to have a TON more work then taking after your small birds