I completely understand where you're at. I hate it when people try to dissuade me so I won't do that to you. I am really sorry that you are suffering and I wish that you could find some relief without reaching this point. I genuinely don't recommend this method. As you can see in my name and my profile picture I'm disabled. I shattered some of my spine using this method. I also traumatized a lot of people and I have a lot of guilt for that. I met the police officer that tried to talk me down and witnessed it all. I have never seen an officer crumble like that before. He showed up to my house to get information for my sister that was in crisis and as soon as he took my name and realized who I was he started sobbing and asked me for a hug. That was 6 years after and I have nightmares about that moment. There are a lot less violent and risky methods. I bought the book final exit and I recommend reading that.
I genuinely hope that you find some relief. I don't know what your religious beliefs are but I am praying for you. That's from a completely non-judgmental stance, as I too, am here on this forum. Whatever your decision, I wish you peace and success. I hope that you're okay