Your son will really enjoy the trip and experience with others who understand what he is dealing with. You must be relieved that he feels confident enough to take this step forward. As he is away for a time, hoping you will take the opportunity to pamper yourself with a soothing massage etc. You need to restore yourself after the shock you too have been through.
Your son will learn so much on the trip and make friends who will also be there for him when he returns. It is a wonderful opportunity to acclimate to his new world with mentors and peers.
Soon he will learn the guitar and have his doggie companion to give him joy.
I am sure you will be happy to receive updates from him that he is loving the trip
Thinking of your family and praying your son continues to accept his situation and is on the path to his new world. Looks like he is doing so well so far.
Hugs, Dot xxxxxx