[Closed] Our first dog. Any advice?

So I've broken all the rules and decided to get a dog for Christmas. However we've mulled having a dog for two years and I decided to have a sneaky visit to see the pups tonight.
Had a good look round, spent 20 mins with them and said i would call the owner.
I fessed up to the mrs and she was thoroughly on board!
So I'm picking up our new jack/beagle cross on Tuesday. Any advice as we're shitting it to be fair, I'm sure kids weren't this stressful 🙂