Doberman are smart dogs. They are strong, some of them are clumsy, they like to play, and they have big teeth. This combination means they can get up to a lot of mischief if they are so inclined. We strongly recommend you enroll your dog in an obedience class. While it will not change the intelligence, agility, strength or teeth of your Doberman, it will make life with your dog a lot more enjoyable because you will know how to work as a team, and you will be in charge.
Some Doberman Rescue groups require adopters to enroll in an obedience class. We don't make it a requirement but we think it is a great idea.
Some people send their dog away for obedience training where a trainer works with the dog for several weeks and then shows the owner how to control the dog in a few short classes. Some establishments even offer lifetime refresher courses. We are not all that keen on you sending your dog away for training because you BOTH need training. The classes are as much for you as they are for your new Doberman.
Group obedience classes also serve the useful purpose of socializing your Doberman with a group of dogs he doesn't know in an unfamiliar setting. You will learn a lot about your dog. And you will have fun.
There are a lot of different philosophies about training dogs. As the saying goes, "The only thing two dog trainers will agree upon is that the third one is doing it wrong." Find a trainer you like. Someone who understands Dobermans and that your dog likes.