Therapy Service Dog

Jackson, a 12 year old former athlete, is losing his childhood . He used to be a baseball, basketball, and football player and had many friends, but after two years of constant medical testing for his fatigue, migraines, weight gain, and sudden depression nothing could be definitely determined. Recently he's been diagnosed with a severe Sensory Disorder which has left him working online for his schooling, becoming socially introverted, and a loss of his smile.
His one passion that has always remained has been his love of dogs. We recently got a lab/golden retriever puppy to train to be a therapy animal to get Jackson back into a world in which he can function.
I'm a single mother teacher who's heart breaks when I think about the childhood fun he's missing out on. I've tried every avenue a mother could try, and know this Is the key.
The training is way beyond my means, though, and although I'm more of a giver than a receiver, I swallowed my pride and am asking for your help....I know there are many deserving people out there but if you'd look into Jackson's sweet eyes, hear his hilarious laughter (all too rare these days), and know his compassionate heart, you'd realize the importance a therapy dog will have in his life.
Thank you in advance-
Desperate and Humbled Mama