PLEASE! First, understand that MANY Dobermans today are bred to be "generic" in temperament. By that I mean not bred for the specific work the breed was developed for, but rather just for house pet or show ring. Many breeders just want a Doberman that LOOKS like a Doberman, but is as goofy as a Labrador, with an "easy" temperament, making them no more challenging to own than a cocker spaniel.
I'm speaking of Dobermans bred to be DOBERMANS. Dogs with the specific traits which should be unique to the breed. This is a Doberman which is loving, loyal, temperamentally sound, but capable of being trained for police, military, dogsport or personal protection; what it was develop for.
So obtaining a true Doberman takes thoughtful consideration. Consideration of not only what YOU want, but what the DOG needs and wants. Please educate yourself as to how well you, your family, your situation, your environment and your interests mesh with those of the canine companion you plan to spend your life with.
I was an animal control officer for over 20 years: the most common reason people turn their dogs into the shelter was one thing - incompatability between dog and owner!
People who think a dog's character is a result of "how you raise them" are far too often sadly distressed to find that the dog they thought to shape to their whims responds instead to DNA traits which will not be denied.
A Doberman is a Doberman - not a Basset hound - because of that DNA. While dogs are individuals, the better bred ones WILL exhibit strong breed characteristics.
PLEASE! Be fair to your dog - make sure you are an appropriate fit with this breed.