In actual reality, if detach emotions from it and don't over complicate It, the act itself is definitely super simple
For example, get a gun, shoot yourself in the head
Find somewhere high enough, jump down from it
Grab a rope, hang yourself
Find a lake, jump inside, don't swim back up
Light a fire, jump in it and just stay there
Or go into wild nature areas, where there are deadly predators/ animals, wait for them to attack and kill you
But of course, as
@wtg mentioned, it's the "doing it" which is the hard part. We're just too afraid of pain