coaching courses recommended for families and patients dealing with catastophic illnesses

I have been counseling cancer individuals and their caregivers as a volunteer for over 3 years and would like to do it professionally. I have been down that road with members of my family and friends as well as the volunteer ;organization and was solicited to work with an organization to help others and was very successful in working with these families. I have had experience in other kinds of coaching but feel the need is great in the area of catastrophic illnesses and the toll it takes on the families and patients.