There's a solution nobody has mentioned yet, which is using an iMessage bridge application (allowing you to message iPhone users over iMessage). If you have a machine running MacOS, I just started using one called OpenBubbles that works great and, unlike other bridges (AirMessage or BlueBubbles), doesn't require you to spin up and run a Mac as a server.

Alternatively, iOS 18 drops this month and has support for RCS, as some have mentioned. This is assuming you use Google Messages...

I know you mentioned audiobooks but what about some digital books? Personally, reading makes my eyes tired so I know that, for me, reading something would be a good way to provoke a nap.

As a response to the idea that you may get fatigued by passive media, a book may be a good balance to that. With movies, shows, and audiobooks, you're going to be listening the whole time. It's just constant noise. A book may be more meditative.

Which reminds me, this may be a good time to practice meditation.