Learn your bird's signals for best play time results. As I am not a tall person, I took a cautious approach in first learning how to handle my male Moluccan cockatoo. He was my first large parrot, a romping, stomping, swash-buckling adventurer in feathers. I started slowly, allowing him to flip off my hand backward and swinging him gently. To right him easily, I sang a song to him, 'The Man on the Flying Trapeze,' On the last stanza I would swing him up high and he would then right himself as he knew that was the game we were playing.
Cockatoos love to play games with their humans.
If you are right handed, always handle your parrots with your left hand. This gives you confidence and helps to stifle inherent fears of getting bit on your primary hand. I suggest that you learn to use both hands to carry your large parrot. All my cockatoos enjoy having one foot on or in each hand of mine. This position gives you the maximum control over your parrot's motions.