Without a doubt: full suspension hanging is better.
It's fast; consciousness fades in a matter of seconds. It's accessible: a good rope, a strong, elevated place that can support your weight, and at least an hour alone guarantee an escape from this world. Knots can be easily learned by watching Y0uTube. It is one of the most well-known and widely used methods worldwide for hundreds of years. You can watch tons of videos on WPD from people who've done it, even to understand the mechanism/procedure.
Important - Before trying any method it is always better to be well informed.