I've given up on my ideas of a peaceful death since I need to die as soon as possible, there's a couple tall buildings in my city I could visit but I'm wondering what drug would make it easiest to go through with. I tried ketamine and that made me feel super empty and like a husk of a human which might motivate me to kill myself more if I start to feel like that again in the moment. LSD also made me almost jump off a mountain when I was like 15. I'm thinking I'll do some ketamine on a rooftop until I can barely feel my body then crawl to the edge and fly off.
This isn't an answer to your question.
Deaths that may be suicides are not always classified as suicide deaths.
So in 2021, there were 48,179 suicides (14th highest cause of death). But there were also 101,992 poisonings and 16,862 deaths due to alcohol abuse and 3,848 deaths due to drug overdoses. But let's say half of the poisonings, alcohol abuse, and 75 percent of the drug overdoses are actually suicides. That would be 110492 deaths by suicide, making it the 8th highest cause of death, not the 14th.
(
https://www.worldlifeexpectancy.com/usa-cause-of-death-by-age-and-gender, data from 2021, there's probably more recent data)
i'm mentioning this because i wonder if you do this if your death will be wrongly categorized as not a suicide and instead some accidental fall due to drug use. Probably not, it would probably be classified as a suicide if you fall from an unauthorized area.
I don't have an answer to your question. I am too scared about people blaming others for suicide attempts, including blaming me, so I try not to say any suggestions on best ways, even though I am pretty sure it's not illegal for me to comment on your question.
I'm really sorry you are feeling so terrible. That's all I have to say. I wish all of us were less sad. I hope you feel less sad.