I am not a fan of marijuana (or any street drug) but it is incredibly hard to mess it up. It has a fantastic 'therapeutic index' - a big fat window between the dosages where it starts having useful effects and those where it starts potentially harming you.
(anecdotally I would wonder about impact on lifestyle, but killing yourself with pot would be pretty tough, and expensive)
This is a big contrast from serious downers which put the happy zone right next to the off switch, and build up tolerance...
"but killing yourself with pot would be pretty tough, and expensive"
It seems to be impossible to actually overdose from the THC contained in marijuana. No one has actually managed to kill a large mammal with THC, but they have managed to kill small rodents.
Extrapolating up it seems that you might be able to obtain a lethal dose of THC by consuming somewhere between 1/3 of your body weight and 1500 lbs of marijuana (all at once).
(anecdotally I would wonder about impact on lifestyle, but killing yourself with pot would be pretty tough, and expensive)
This is a big contrast from serious downers which put the happy zone right next to the off switch, and build up tolerance...