I am so sorry for the grief and what you are going through :(.
I don't know if my own thoughts are similar, but I have been struggling myself with rather or not to leave a note(s). The main worry I have is a note could cause someome additional pain in the way of causing them to blame themselves. If there is no note then they might be left wondering why or with little disclosure, but what if I write something that makes them blame themselves or think they could have prevented it and it's partially their "fault"?
Another is I have no clue what to say or how to say it. The reasons why I want to ctb are complex and I am unsure how to summarize a lifetime of pain and suffering in a concise note.
The only reason I would leave one would be to leave something for the people left behind and to try to provide closure for "why". Again I struggle with how to do this and what to put in the note. Should it be focused on trying to explain why I did this? Should it instead apologize and be full of the things I love about person x, shared memories, things I am proud of them for, etc? A mixture of the two?
It's not something I can just ask like "hey, if I were to accidentally die in a car crash or be diagnosed with a terminal illness what would you have wished I left behind for you or said/did before I died?"
It can also be dangerous if you survive. In a previous attempt where I did leave a note with some reasons as to why (abuse) it ended up being seized by police and I was pressured to press charges against a party to the detriment of myself and my own already rock bottom mental health.
Anyway, those are some of the thoughts I personally struggle with. Hugs