It's never to early to get into routine.
Does he have a crate? Time out is important 4 everyone. Barking can be controlled, it's early so all noise is new. Also, animals hear differently at ground level and the hearing is much more acute than humans! Keep him on the lead to check him if he barks, a gentle pull back with a small treat or toy to distract him. All noises are new, he'll get used to them.
I suggest: all of you take turns to feed/groom him. 1 takes care of him each day where practical. He should be encouraged to go onto his bed/crate when you want peace and quiet even if someone sits with him on his lead. Quietly keeping him placed: I did that with my cocker, 7 months when she bounced in here. A gentle reminder who is in charge.
Encourage him for fuss when you want it so that he doesn't become demanding or attention seeking. No up on the furniture, he should never be higher than the 'alpha' person. Same as he goes through doors when invited: this is your house, he's the guest for the moment. So the adult in control goes through doors first, he sits until allowed in. That way if it's a quick visit into the kitchen he learns to wait 2 C what is next on his agenda. Which might be nothing at all.
How is he over his food? If he begins guarding, feed by hand. Make him sit, wait, then show him the food: 'take it'. Same with toys ...........
R U worried that DH will get fed up with the dog, when did this come to light? Wasn't this discussed in full with contingency B4 you contacted the Rescue?
Mine never wanted one
![Cry :'(](https://www.menopausematters.co.uk/forum/Smileys/extended/cry.gif)
and I worked myself into the ground trying to keep her on best behaviour. (long story short).