[Teresa Ford]

I have and did train therapy dogs. Your dog sounds like he has the makings of a good therapy dog.
Therapy dogs should be Vet checked, up to date on all shots, free from fleas, worms and other health issues. They should be freshly groomed, with short blunt nails and good dental health (no bad breath).
Start with the basics puppy training / obedience. Get your AKC Good Citizens Cert. Teach him that when he has his vest on, it work time. It is useful to teach your dogs some cute basic tricks too. Especially if you are going to do visits with children.
One of my dogs is excellent with children, but hates visiting the Cancer patients, we think she is very sensitive to the Chemo drugs. She has to be lifted to child and she just closes her eyes and goes very still, allowing them to pet but not really interacting. She does beautifully with children that are not doing Chemo. Know your dog and excellent training are so very important. God Bless, and thanks for passing on the Love !