I think the initial info graphic is a great starting point. Most 16-24year old youth should find its readability appropriate to their reading comprehension, as well as agency staff.
I do not know how common prescribing Ritalin to children with ADHD is currently in Ontario, but adolescent physiological changes can cause the Ritalin to have a different effect during late teens, resulting in a craving for a different drug to cope with the changing symptoms. This may be relevant for TAY.
Also, with the advent of recognition of the traumatic histories of most youth with mental health and substance abuse "issues", having agency staff familiar with "trauma-informed" programming (asking "What Happened To You?" rather than "What's Wrong With You?"), and having "Trauma-Informed Services" (such as Intentional Peer Support), and use of WRAP (Wellness Recovery Action Plans) or RIS (Restorative Integral Support)-which involve inter-agency collaboration, which can be facilitated with multi-agency "Wrap-Around" service[s] coordination meetings of staff from the different agencies involved.
With Street-involved and homeless youth, "relational brokenness" may be a common issue. If local churches or interfaith groups are involved in "ministering" to such youth, a 2-page paper published in ACEsConnection.com/Blog entitled: "Attachment Theory and the Gospel explored-How relational brokenness redefines our existence" by Chaplain Chris Haughee of Intermountain [Children/Youth] Residential Services, may be an appropriate "training tool" for such Interfaith or Church groups in the two geographic areas described in the TAY Intro Invitation and Attachment. I'll ponder this post more later, and see if I can't think of further constructive feedback.