Hello, welcome to SaSu.
There are plenty of methods out there that are more reliable, and OD is definitely not one of them.
OD is a gamble no matter how much you take and realistically speaking getting to the LD50 requires a hilarious amount of pills that most people wouldn't be able to swallow in the first place. Not only that, the side effects and damage OD can leave you isn't pretty.
Unless you want to be left in a worst state than you started, I'd personally look elsewhere. The compilation is a good place to start. Look through, ask questions, use the search bar. Most of what you need may have been asked before.