As with any parrot, especially Aratinga conures, expect a certain of screaming. Screaming is a natural part of bird communication. If you are considering the purchase of a Blue Crown Conure visit several reputable breeders and pet stores. First observe the bird's environment looking for cleanliness, ample cage size, varied diet, etc. Interact with the birds and watch how the birds interact with their care giver.
Hand fed babies are extremely tame.
Even wild caught birds can be tamed rather quickly. Their intelligence can be seen early on and they can be taught to preform tricks. Outfitting a Blue Crown's cage with natural perches is a must. Those strong beaks enjoy tearing the bark off of the branches. Then they will likely shred the branches into toothpicks.