Great! I hope it works out for you.
I did find something after scouring the internet.
If you want files (any kind really) to get preferential treatment you should rate them as 5 stars. Supposedly this will put the files you want most to listen to at the top of the list, or it may exclude all others, I'm not sure.
Normally should be able to access a file's properties/details/rating and select the number of stars. Well that's a major pain in the butt if you have to do that with every.single.file. But if it works, fine.
One problem.
It's broke in Windows 11 and MS knows it. They are working on a "fix" for WMP.

Stated like that it doesn't sound good , but hopefully it will be system wide.
EDIT: I also moved the Music library folder to another drive just in case using the Library works better, and this way I don't fill up the OS drive with a bunch of files.