I would really suggest getting the Old Time Radio app.
It has thousands of old radio shows.
Comedy, mystery, suspense, detective noir, adventure, even movies adapted for radio.
Keep in mind that most are from the 30s and 40s. But a few ran all the way into the 70s.
It can be a little more engaging than audiobooks because they'll have different actors reading their parts and there is sound effects.
It could be really fun for you.
It is for me.
Theater is, after all, the theater of the mind.
Especially if you were born sighted.

Try things that may sound crazy. Like wire twisting. take wire and twist and bend it to create sculptures or use clay, paper or anything that will dry when your done.
I learned how to paint and become a blind visual artist. I was unsured but motivated by John Bramblitt. He told me there is an artist in all of us. He said we just hold it in because we are afraid of being judged. He said just do it, enjoy it and if someone says something negative, just say F-you I’m blind! John is also blind and has sold art in over 130 countries.
Check out Dan Parker from Columbus GA. He is a blind machinist that makes Designer aluminum pens and specialty items as need, oh by the way, he has built a corvette and is well on his way to breaking a world speed record. He already hold a world record at Bonneville salt flats on a three wheeler that he designed and built.
George Wurtzel, you may know him as the Subaru guy from the commercial on TV. He also is an artist that specializes in wood furniture and wood turnings that he sells from his art gallery in Tennessee. Before that he build Engines for Volkswagen USA.
I could go on and on because when i was in that very dark place that most of us have been, I decided to research amazing blind people. I mean other than Hellen Keller. What I found, I could fill a book with. So don’t Limit yourself by what other people think. If you can think it, up figure out a work arounds on how to do it. Then go for it and Never give up!

I have had this issue for years! I think there are only two options:

1. Get some kind of fidget-y activity: Doodling, knitting, etc..
2. Embrace physical activities: Walk for even longer! Do chores in the kitchen. Get on an exercise bike.

I find everything else too distracting from the book. It's just stuff to keep some part of my body active at all times while listening. Relaxing completely is the enemy with audio content.

If I'm honest, that boredom / anxiety is something to be addressed. Distractions aren't long-term solutions.

Get into mindfulness meditation. Check out the Headspace app as a good introduction to it.