Try to remember that, since he's just a baby, he doesn't have much control or capacity. Putting him on a regular outing schedule will help along with him asking to go outside. Plan on taking him out every couple of hours during the day whether he needs it or not. When he does need to and does his thing, go out of your mind with happiness and praise him the instant he finishes. Connect his actions with your happiness immediately. Also, this helped me a lot; at night, put him in a box or a crate that he can't get out of. He won't soil his own area, usually, so he'll wake you up with his whimpering so you can let him out when he needs to go. This was a really big help to me, and I've used it on every dog I've had since I discovered it. Works like a charm! Be patient and you will be rewarded with a well trained house dog in no time!