I have a new Android phone on the way. I’ve always used my Ipod Touch(4th generation) for my music and audio-books. I’ve done that mainly through itunes.
When I put an audio-book in, usually in MP3 format, I just select all the MP3’s and right-click on them in Itunes and tell it they are “audio books”. I can even adjust the volume of the files and set them to “human voice” or something.
How does it work on Android? How do I tell it that a certain set of files are music and some are audiobooks?
Does it auto-detect albums and artists like Itunes does? Is there a “itunes” equivalent for
My phone comes with, I think, Nougat(7.0) Android, but is updating soon to Oreo(8.0).
I asked a lot there, so just take a stab at it if you like. 
One method: Keep the different types in separate folders. And optionally use a different app for listening to each type.
If you’re using Google’s supplied apps - which would be the closest concept to “iTunes on Android” - there is one app for music, one for movies&TV, and one for books. If you choose to not use those apps, you can use whatever other available android apps you want.
Android doesn’t enforce a standard, and doesn’t have an “iTunes equivalent” to create a de facto standard, so you’ll have to manage your own media.
ETA: searching for “media management” on the Play Store turns up a few candidate apps to help you.
Black Player is the one I ended up with and the one I recommend to others.
It’s free, but having used it, I would easily pay a couple bucks for it. It organizes my music by artist, album, and other ways and is really smooth.
The free version does not appear to have ads or anything. Maybe I’m missing them.
It appears to do everything Itunes did except copy the music on for me, which I prefer doing via Windows Explorer anyway.