I don't want to pressure you, so this reply to your concern is really directed at anyone reading who might feel the same way.

This is supposed to be fun. That's why we're doing it. No one expects perfection or anything close (and a good thing, too, or they'd have thrown me out of the place years ago). If you--or anyone out there--would enjoy filling a prompt, do it! That's what they are here for. I can't speak for either of our kind volunteers, but I will say that if I were to provide a fragment for folks to riff on, I'd be thrilled when someone did no matter the way they wrote. Of course, if it wouldn't be fun you shouldn't do it. Life has enough stress in it already--fandom shouldn't add to the burden.

Just my two cents' worth. Which won't buy you much these days.