

I’m not sure about a dedicated website but you can already do that by just having a blog and sharing your blog posts to a link aggregator (like Lemmy or Hacker News). You could possibly create a Lemmy community that only allows “grassroots” “journalism”, ie no professional news articles but only amateur/hobbyist blog posts.
Idk about an informal word but I call it butt crease. Probably not the medical term but it’s what I call it for medical contexts (as a patient)