@Armchaircouch first off my condolences for what you and your nephew are having to go through. This is never an easy thing to process.
Everyone else has given you more or less what I would offer up, sans one last bit of advice.
One of my military buddies was the only person to ever stress to me this:
Grief isn't linear. It's okay if you have a day where you "laugh too soon" or cry "when you should be over it".
It was honestly one of the best bits of advice I ever got dn this subject.
And it’s so true, thank you for sharing this as well , ♥️ @Hobyrim