Hello, I'm new and I'm starting to post NSWF content. My account is brand new, created today, but I've been on this site for a very long time. I can't find where I need to go to post content.

yeah I don't know where to publish Safe Not Work For content

I do...use a heavy-duty excavator and dig through 999.000ft of ultra-hard bedrock. once you get there, there will be a door no bigger than a pet's door..get in,and there's a computer with a password that's 90 billion words long(changed at every log in attempt), once you get past that as well, a special website is open right away,but be quick,the internet connection's a cheapskate, you only have 40 seconds of internet at the speed of 20 gb/h. be detailed on the tagging process,one microscopic mistake, the site would outright refuse that,but don't lose hope,you can try again next millennia.

At the top left, there is a section that says "upload" (it does not appear from the forum, only from the "post" section).

You've been here a very long time yet twice now you can't type nsfw correctly

If you're not a Japanese artist this is not the site to upload your art to, whether it's NSFW, SNWF or SFW. It'll just get deleted as off-topic, because you ignored the rules. As long as you follow Japanese censorship laws, Pixiv should work just fine for uploading your NSFW art.

Not entirely true, if the art heavily inspired by Japanese/anime-style art it is still generally accepted