Glitter, that is wonderful ! I am glad that you are looking forward to finding your dog, and I think that realizing that you can't properly take care of both a baby and a puppy all at once, DOES mean that you are very responsible !
You would not believe how many poor puppies end up on Craigslist because someone has a baby, and wants to have a puppy to "grow up with " their child. Then, they realize that they have just undertaken two full time jobs, so the puppy is sold or given away again.
Actually, Craigslist might be a great place to look for your new dog. You can actually talk to the owner, which you cannot usually do when you get a dog from a shelter or dog pound, so you can ask how the dog is with children, and any other questions that you might have.