My dog was quite similar albeit older, he's snappy and narly if he's grumpy, his space is his space. He would also sleep on our bed at night. He was sensitive to noise so we did wonder how he'd react when he brought new baby home.
My dog was giddy around children and hates other dogs, including pups.
One thing we did in advance of baby coming was get him used to sleeping on floor, I didn't want him at the same level as the Moses basket. This worked fine.
We put a blanket in with Baby in hospital and for a few days there and then gave this to the dog to get him used to it.
To be fair the dog pretty much ignored the baby when he was new, he just wasn't interested. As long as he had his cuddles on the sofa he didn't care. I didn't trust him around the baby but to be honest I wouldn't trust any dog around kids, this is just common sense.
We never ever left them alone together, if I was making a cuppa tea, baby would stay in his bouncer in living room and the dog I'd call to the kitchen with me so he didn't feel left out. When I had a shower baby would come with me and the dog would be downstairs somewhere.
The baby is now a toddler, two and a half, and the dog is still the same as before! We've had one incident when the dog nipped him as he pulled his tail, however apart from that they leave each other alone but acknowledge that the other is there.