Music on Apple Watch without Apple Music

Hello everyone,

I have the annoying problem of getting music on the Apple Watch. The traditional way via Apple Music is too inflexible and takes too long. (And in the end it only loads 50% of the content)

Is there another way to “quickly” load music to the Apple Watch in the form of a file manager.
It should be a native app. I tried many apps but they all depended on the iPhone.
The best app on the iPhone would be Evermusic, for example. Simple, easy and comfortable.

Thank you in advance