I would definitely not get them both at the same time. It’s not so much the potty training I’m worried about – it’s all training. Two puppies will be so much more interested in each other than even the kindest humans. I’ve seen littermates grow up together, and some never truly bonded to their people.
Even if they do both bond to you, you’re still making life unnecessarily hard for yourself. While you’re teaching one not to lick the outlet, the other is peeing on the floor. When one jumps up on the couch, the other is getting into the trash. On walks, they’ll constantly pull in two different directions. At home, you’ll need to separate them when they get overtired (which is constantly) because otherwise they’ll learn the bad habits of overly aroused puppies.
Nah. I’d get one puppy, train and enjoy him/her, and then go out to get a lovely friend a year later, at the earliest. They will still absolutely love each other – and you’ll have puppyhood twice.