I am setting up my first Kobo, but with ebooks I already acquired elsewhere.
I have this plugin installed...
https://www.mobileread.com/forums/sh...d.php?t=215339
And this wiki page has been of help also...
https://wiki.mobileread.com/wiki/Kob...nd_Collections
The plugin can help with book series. The wiki page can help with Collections (though I haven't set that up yet).
About the DRM, I don't know and others will need to advise, but I guess metadata from Calibre library is transferred across, not what is embedded in the book.