I've been surrounded by substance abuse my entire life, and narrowly escaped it myself. Feel free to schedule a call with me, if you think talking to a stranger will help:
[1] https://calendly.com/taylor-town/30min
You may also want to talk to a professional:
[2] https://www.betterhelp.com
It's not specifically about grief, but The Anthropocene Reviewed is a collection of essays that have really helped me navigate my pursuit of happiness and meaning. It was published as both a podcast and a book:
[3] https://www.wnycstudios.org/podcasts/anthropocene-reviewed
[4] https://www.amazon.com/Anthropocene-Reviewed-Essays-Human-Ce...
My condolences on your loss.
It might be worth talking to a licensed clinical therapist with experience in grief therapy.