I understand. A few years down the road, you will start dwelling on things you wish you had known and things you could have done differently.
I am very happy with my boys, but there are things I could have done better. Good thing my first boy is smarter than I was.
Best advice: keep things positive and fun! Positive training along with structure/consistency make for much happier pups. View potty training as a sport rather than a chore.