Nice lookin’ young dog! Like the other posts mention, take it slow with him since it is all new for him. Try him with the leash and some treats as a reward but keep it short and end it on a happy note each time with lots of praise. I’d also leave him alone a bit too so he can just settle in on his own.

After a couple weeks of taking it slow and having a routine with him, you will have a bond started with him, then you might want to start bringing him the house a little and having him around people more so he gets used to it all. Patience and common sense will go a long ways to settle in a grown dog. He is at a good age to learn new things, but best not to rush it.

Good luck with him, he looks like a confident happy bulldog.