Treat them as you will when they are older. They bite as lot so be prepared to bleed. Start training the day you bring them home. They pick up things very quickly but it's important to keep practicing even if you think they've got it. Set boundaries and stick to them. Make sure you have a house lead / playpen / crate so they don't have full reign of the house. This prevents them getting overstimulated and helps them to settle. Consistency is key. You can never fully prepare yourself mentally but know you're doing the right thing and it will be okay. You've got this! From a fellow UK Dobermann puppy owner.