im not a legal expert but i feel you are 100% in the clear if you just talk about it because everybody on this site has plausible deniability because most users on this site are a bunch of pussys and would never do half the shit we say we would on this site for losers
now, on the other hand, if you started posting your self-harm pictures of your arm being all cut up or you shooting yourself in the leg or something then yea i think you would get banned almost immediately because then other forums would say we are creating a haven for suiciders which would be bad publlicity for the image of this site and would be bad for sponosors and would get the site taken down
so i think as long as you talk about it you are fine. if you really want to get super deep in suicide talk id avise to PM somebody or hop on over to discord and kill yourself on discord because then nobody would care because discord is too big too fail (i.e. hence why discord is a pedo haven but nobody wants it taken down because it is instrumental in entertainment)