Tried to use Show HN for my new project a couple months ago with almost no traction. It's a software literacy tutor, so I guess it's not the right audience, but my intuition aligns with this. For reference, an earlier post showing the practice engine that powers the literacy tutor did pretty well back in 2023 and it was my first post. I've had more success getting sign ups trying to do just the tiniest bit of SEO.

Trane (good post): https://news.ycombinator.com/item?id=31980069

Pictures Are For Babies (lame post): https://news.ycombinator.com/item?id=45290805