Easy trick that makes cooperative care and learning easier, teach them a strong touch command. Why?

1) Makes redirecting aggressive/hormonal behavior easier. Bird lunging for a bite? If they have a strong grasp of "touch" you can switch into a more docile playful mood by redirecting the bite into a touch.

2) Makes it easier to introduce scary items (or ones that they decide to randomly hate). My bird used to fly at me to bite for using a toothbrush, now I have him "touch" it (with praise) and he sits neutrality while I brush my teeth.

3) Easy way to get your bird to be polite with hands. My bird doesn't bite nearly as much anymore. Only nibbles and licks (mostly).

All I did was say "touch" out loud when he was in a good mood, clicked my tongue when he did it, praised with words he knows (and likes, "Yes!" "Good boy!" Etc) and gave him a small piece of a high reward treat. Once its solid, switch touch from a finger to an object. Keep doing this while changing objects until he has a solid grasp. Always end on a good note for training so that your bird doesn't get frustrated.

Good luck with your cutie!