You specifically say "other forms of nsfw content". Comics? Animations? Stories? Novels? Audiobooks? The answer will very much depend on the context.
Do you have a specific question or two in mind?
Maybe it'll help someone here figure out what it is you feel like you can't ask here already.
Perhaps I'm being simplistic, but the Artwork Creations forum here on F95 tends to cover a lot of discussions about technical and non-technical solutions. Less than the rest of the threads, but they're still there. Plus these developer forums are both a mix of programming and technical art problems (usually Daz or Blender) too.
btw. imo... the answer for stories, novels and audiobooks is that you just need to find a stories, novels or audiobooks support forum. Primarily because the answer to NSFW questions is generally the same as SFW content - due to the hard part being plot, timing and characterization... unless you're looking for insider information like good publishers or trustworthy accountants.