Good for you getting him neutered! You can get a coupon from Friends of Animals for a discount on the neuter. Check out there website
I truly believe this WILL help him. I think you will still need to train him to your rules and house and potty train (maybe get a BB anyway), but at least you know those hormones are not raging through his body and he can just be a dog

and you all can move forward.
A neutered boy is quite different and you will be pleased with the results as long as you stick to the training aspect as well