Ask HN: How to use social media as an indie dev?

I'm an independent developer looking to launch a project soon that I'm excited about. I'll obviously post it here as a Show HN, and maybe in a few subreddits - but I'm out of the loop on where and how to reach more people. Haven't had a Facebook or other social media for years. I don't maintain a blog, though I assume I should. Does anyone have any resources or can speak to any experience doing this? Of the many hats I now must wear, this is the one I'm most begrudging about.