Help Hanging method: how to get it right so you don't feel pain?

[KAZ-2Y5]

ive been watching videos on gore sites for suicides related to partial and full hanging methods, I saw some where it looked like they were in a lot of pain, some where they instantly were lights out and those ones tended to see the persons head leaning on the side of the rope while hanging. ive been reading the megathreads and I want to not fuck this up. been reading up on it for weeks now. any tips?