Good morning Debbie,
I can point you to a ton of on line free resources if you want to email me.
I attended a workshop a few years ago for first responders entitled
"emotional armor for first responders", it was for police and firefighters. It was a two day workshop.
I have been a FF/EMT and am also a NEAR/Trauma informed trainer, I am also a mental health and child mental health professional.
I think it might be useful to get clear about your objective......are you trying to educate FF about basic ACES? (30 minutes would be a brief intro), Dr. Felitta has a few good you tube presentations.
I would be glad to help you hone in and find what you need or help you create it.