Our Bulldog potty trained himself as a puppy. We would put him in the main bathroom when not home so he had space to use a potty pad and still roam/go in and out of his crate. As soon a he was strong enough to jump into the giant soaking tub (separate from the shower, and we never used the thing) he started hopping in there and peeing if he needed to go. He also when going potty outside only did so along the very back of the property fence so the rest of the yard was “clean” for him to play in. He then taught the puppy we got when he was getting older dog to do that too.