Try http://www.irishanimals.com - they have a big list of dog shelters and rescues, most of whom will have a chat with you to help you work out which kind of dog best suits you.
These shelters/rescues will know each of the dogs in their care, and will be able to choose one based on what they know of the dog's temperament, personality etc. They will also be able to advise on training, feeding, exercise requirements etc.
Edit: Oh yeah, I forgot the obligatory lecture
. Make sure you do your research (which you seem to be doing) about the work and dedication a dog needs. Given that you already have a 15 month old baby, you can factor the same level of love, care, interaction etc. with a dog. Have you thought about suitable housing for the dog (if you're not going to let it stay indoors in bad weather and at night)? What you'll do if/when you go away? How much it'll cost to feed/neuter/care for a dog? You'll be expected to make a small monetary donation to the shelter when you collect your dog - they don't profit from this, it merely goes some (very small) way to covering their costs - most shelters are run as a labour of love, and end up costing those who run them a fortune.
Do you work? A dog really shouldn't be left on its own for extended periods - for some dogs, even a few hours is an extended period. Given that you have a young baby, a slightly older dog would be a good idea - they're a lot calmer than puppies, and a hell of a lot less work.