Dobermanis a highly admired working dog, and you can bring out its best traits with early and consistent training. Start teaching your Doberman puppy basic commands such as sit, stay, and walking with a loose leash from an early age. Potty training a Doberman puppy can be one of the most challenging tasks, requiring a lot of patience and consistency. There will be accidents along the way while your pup is learning, so it's important to start training right away to provide guidance and avoid bad habits.
If you're looking to buy a Doberman, it's essential to choose the right breeder to get a pet with fewer aggressive tendencies. If you're new to the breed, check out this comprehensive overview of the Doberman breed to get up to speed. Dobermans need to be socialized from an early age and throughout their lives. I believe it's important to train Dobermans when they are young for nighttime use.
Even if you think you can only afford a few one-hour sessions with an accredited dog trainer who is familiar with the unique training requirements of a Doberman, I would recommend it as it could help you get on the right track with your training at home and make a difference. I wrote an in-depth guide on how to train your Doberman on a leash in my article
How to Train Your Doberman to Walk on a Leash. If you have an unusually stubborn Doberman, all you can do is increase the motivation to follow your instructions (for example, Rebecca Roter from Aludra Dobermans is an AKC merit breeder, longtime member of the DPCA Public Education Committee). This command can be more difficult to teach to high-prey driving dogs like Dobermans than many other breeds.
In addition, since lying down is an act of submission, it helps establish yourself as the dominant figure in the family - something that is very important when working with Dobermans.