Ask HN: Forum/Blog Combo Stack

Wife wants to write stories/blog, I want to administer a forum...both on the same subject.

I'm a backend software engineer based in networking and don't know a ton about what's out there. Initially I was planning how to write this all, but I'm assuming this is common enough that something exists, or perhaps a reverse proxy setup where www leads to something WordPressish, and forum leads to something phpbbish.

Anyone have a similar experience/recommendations?

If it matters at all, I know nothing about frontend dev or php for that matter. Mainly C/Go/Python.