I'm not certain the whole community could be involved at the level. Certainly the psychological first aid level, yes. Maybe you an area to look at is retired folks, who have been in or around the field. Many retired people are still looking to do meaningful work in some way, so this seems like a good avenue.
As a school counselor and having worked in the child welfare field, it is something I would be interested in volunteering for, so there may be people already somewhat related to the field that may be good targets as well.
Beth