there are plenty of resources here, i'm sure that you will find a good method by browsing around.
and about your drugs, zoloft and gabepentin are really safe and hard to OD on, zoloft will give you very shitty effects like serotonin syndrome which sucks and gabepentin is so safe that some people take what would be considered multiple ODs just as a recreational dose, there is not even an identified lethal dose on mice. even pregabalin which is around 4 times as strong as gabepentin is virtually impossible to die on, i've taken 4000 mg of it and didn't even need to go to the hospital, and my health state is as fragile as my name in this forum.