How to turn your lizard brain off and just do it?

[Polecat]

Alcohol doesn't seem to work. Every time I try I just start freaking out. Would like to know how to force my lizard brain to recognise that this is necessary

 

[Circles]

My view is that the pain and suffering you experience has to outweigh your fear of death. Only then can you overcome your survival instinct. I know it's easier said than done but that's how I feel like I can mentally prepare for it especially while having chronic pain. Numbing yourself only gets you so far. But pain can give you the motivation to through with it.