@WashAsDelicates
I downloaded the Borrowbox app onto my android phone.
There isn't such a wide selection as Audible, but there are thousands of books on it and they are the same books that are on Audible-read by the same narrator. You can borrow a few at a time, my library lets me borrow 5 I think and there is a sleep button too.
Get your library card, go on to the library webpage. Scroll down to the e and audible book link, Click on it. It will take you to BorrowBox. You will then put in your library number a pin that you create. If you are unsure, or your library operates in a different way, just pop in and ask them what you need to do.
Then away you go! You can just go and have a browse anyway-right now- without having to register to see what you think.
You usually get a set number to borrow, for about three weeks but if no-one else is waiting, then you can renew. Your book will be automatically deleted from your phone when it reaches the return date.
If you don't like the book, you click the return button, it is taken off your phone and you instantly get another credit.
Try it. I think you will be pleasantly surprised.
I have Audible as well, and the only difference is that the selection is wider, there is never a wait list for a book and obviously no return date but then again, you do have to pay £7.99 for each credit. By the way, you say you are nervous about wasting a paid for credit but can return a book, within reason, if you don't like it.