I would audiobook 24/7 with the open ear headphones (Shokz etc) but I don't think I could afford to pay for that much that was worth listening too / low maintenance.

https://www.openculture.com/freeaudiobooks

As others have pointed out, libraries often have Libby access which can have pretty huge selections of audiobooks. There's a discovery feature that lets you search by vibe, which I am finding useful.

Use the library