G.N.
When he poops in the diaper, you can always bring him to the bathroom and dump the poop and let him flush it and then let him wash his hands.
Getting a little potty for him will help, I put the potty chair in the livingroom so he seen it all the time and let him play around on it. I sat him on it with no diaper and let him play with the laptop, you can always give him a book to read. When he pees or poops make a huge deal, do high fives, say mommy is sooo proud of you. It will take time, but keep it consistent, he will get it eventually. Let him see you and daddy go potty it will help him on what he needs to do.