Can Some One Please Give Me Some Step-by-step Instructions For How To House Train A 3 1/2 Month Old Dog?

The Cockapoo is a 3 1/2 month old, we are trying to teach it to only go to the bathroom in a certin part of the yard, Please help!!!

House Training Pup- Please Help?

I have a 2 1/2 month old cockapoo. I have had him for a week now. What is the best way to house train? At night, he sleeps in his cage. Surprisingly, he has NEVER went to the bathroom in his cage.
But throughout the day, he will go to the bathroom throughout my place. When it happens I generally say “no” firmly and then usually will take him out right away.
Is that the best way to go about it? Thanks.