@Hooni ,
IANAD.
No matter what, this will depend on age, where you are (Alabama? Tokyo? Etc), number of prior attempts, access to firearms and other means, home life, and psychiatric evaluation. Probably there are other factors that I have not thought of.
Since you are planning on surviving, the act is utterly performative, so what happens if you mess up and become disabled?
Surely there are other, less hazardous, ways of getting your point across.