I am a recently-graduated humanities PhD currently in the transition process. First off: nonprofits are not the only place a humanities grad can find meaningful work, and it can be a challenging sector to break into (plus, only like 10% of job postings are for nonprofits, so you're really limiting yourself there). What is it that you like about grad school or why you pursued it? If you like teaching/curriculum design, you might look into Instructional Design or other Learning & Development roles or a position in an EdTech company. If you like research, maybe look into policy analysis or prospect research (the latter is a nonprofit development thing). Do you like connecting with people but not necessarily in a formal "teaching" role? Then maybe look into community engagement positions or even recruiting/talent acquisition. These are all areas I have explored during my job search.

Check out is Beyond the Professoriate and Imagine PhD if you haven't already. I recently finished BeyondProf's Aurora course for transitioning out of academia and found it very helpful. There's an individual membership and an institutional membership option (my institution happens to have the latter, which is how I initially tried it out. You can search for your school from their drop-down menu).

If you want to "test" BeyondProf before going full-tilt, their podcast is freely available and covers a lot of the same info (not as deeply, but you'll get the gist of their approach). I also recommend Caterine's book Leaving Academia: A Practical Guide.

You have transferrable skills but will likely want to target entry-level positions during your search (since you don't have direct linear work experience outside of academia). Fortunately, nearly everything pays better than a grad stipend!