start training them individually. once
they understand commands you can work on them together. but first you need to show them what a command means.
You don't train together. That's why most folks do not recommend two puppies at once. You have to do two separate training sessions and socialization sessions so both pups learn to be functioning dogs when they are by themselves.
What sweeties! Definitely train separately. How about getting your "significant other" in on the training too? Both can train together, but training separately.
Plus definitely look into training classes. The socialization for your pups, with different dogs, will be excellent. Plus will help both of you with training your pups.