I've had a few almost successful attempts over the years. Though, it's only made future attempts harder as a result of me being unable to leave the house without being supervised by either a family member or my boyfriend.
But back to the topic at hand, during my most planned out attempt, I felt nothing at all. I felt ready even though there was still so much I wanted to do, but my desire to cease existing was stronger than my desire for more.
I felt calmer than I've ever felt before, the confidence I had that this would be my end was so soothing. The weeks leading up to the attempt were almost dream-like, nothing felt real and the few moments that did were unbearably painful.
It was like a light switch in my brain had been flicked on. One day I was scared shitless by the uncertainty of what came after, and the next I had accepted, and even found comfort in that same uncertainty.
That light switch still hasn't been flicked off.
I can't say I've felt the same since I made peace with death, or that it's even possible to go back to my prior state of mind.
I can't even remember what it's like to fear death anymore no matter how hard I try despite this happening well over 2 years ago. It's like I vaguely remember how it felt, but it's so difficult to wrap my head around why I was so scared in the first place and I don't know why.
It just feels so distant, like the person I was before died that day.
I'm in a much better headspace nowadays, but I'm still very depressed and I still want to die. It's just not so unbearable all the time, but there are moments where it is, few as they are now. It's really only horrifically painful 4 out of the 7 days of the week rather than the full week like it was 2 years ago.
All in all, I'm not sure how I made peace with dying or even how I stopped being so scared of it. I just don't have any kind of survival instinct anymore and that's all I know for certain.
So I'm afraid I don't have any advice on how to overcome SI if that's what you're looking for, the only answer I have is that it just happens one day.
You'll know when you're ready I guess, I'm sorry if that's not the answer you wanted,,