Suicide just isn't that straightforward unfortunately, we do exist in such an anti-choice society after all where we are denied the option to just pass away painlessly and reliably in an efficient way. If suicide was that easy then I know that I would be long gone and the UK is a particularly anti-suicide country where it's certainly very difficult to ctb. To me all the methods are either risky, inaccessible, or just horrible/incredibly difficult to go through with, but there is information about methods listed in the suicide resource compilation on here. I wish you the best.