++ To this recc. I love audiobook.jp - just getting the raws files is soooo convenient. I sometimes have to use Audible (some things are only on there) but I prefer not to although there are ways to convert those into plain files too…
I also strongly recc スマホを落としただけなのに (natively, audiobook.jp, honto, bookwalker) as an audiobook that is mostly faithful to the text, not boring (except the conversations about Facebook ), and very approachable from a grammar standpoint. It is kind of mindless fluff in the thriller genre, though, which I know you’ve said you’re not keen on
Or several Aozora stories have free youtube readings if you want to test out the method first and see if you even like it before committing to purchases. Ex: 人間椅子 - this one is probably something you’ll enjoy (short story), but it is challenging read due to old grammar + extensive vocab. 雪女 is much more approachable and a fun folktale (also short story), but I dunno if it’s actually representative of a 22 or not - I rated it as similar to 記憶の森の魔女 which is 25 and that sounds more realistic to me.
Also I’m so glad you’ve found something that helps your migraines! I meant to reply this morning, but morning-brain plum forgot!