The best way I have found to train pups is to have an older house dog or two for them to watch and mimic.

Also, having a regular schedule is everything. Get up at the crack of dawn and put them outside. First thing you do in the day. Then they get the idea that the first thing they do when they wake up is "go outside" to pee/poop, and soon they'll just think "outside" when they have to go. This is especially enforced if they follow older "lead" dogs, that are already trained, and get to watch what they do.

The rest involves instant punishment on site, on every infraction, when it happens, not "after the fact."

Any naturally-smart dog will quickly "get it" and adapt to the routine