Charcoal burn suicide method?

What's the difference between activated and regular charcoal? Can I use any kind of charcoal to commit suicide? How much will I need and how small room should be? Any ideas on how to burn the charcoal like in what... Cuz my family summer house has a fireplace but it's in the living room and the living room is pretty big so I'm not sure if its gonna work?!? And yeah I am talking about suicide so if you dont have an useful answer then well you can back the fakk off!!!