My brother just died today

I don't know. He was only 30, he overdosed. Ontop of everything else, my post history. I've been in an unrelated mental health crises for months. I don't know how to support my dad. Seriously, what do I do? He lost his child, he loves all his children deeply and my 2 older siblings lost the person they grew up with. I can barely think straight to try to even figure out resources.

I know it wasn't my fault but someone should have done something, I should've. Words like autopsy are being thrown around and I don't. Understand. I know what they mean just fine but i can't understand. I don't know how to navigate this or help or support my dad from the state I'm in