Hi! I'm fairly new to Linux and Raspberry Pi and am trying to build a music player using the Pi to listen to all of my music albums.

This Web page "https://community.kde.org/Elisa" states the following for Elisa:
Debian Bullseye Testing/Sid Unstable
Elisa is available in the repositories starting from current Debian Testing. You can install it by running:
sudo apt install elisa

Does this mean that I can't install Elisa on the Pi when using the regular version of the Pi OS installed by the Raspberry Pi Imager?

If I can't install an already built Elisa, can I build Elisa myself from the source code on a regular version of the Pi OS, assuming that I download everything else I need (QT, KDE, etc.)?

Apart from getting Elisa onto a Pi, I want to lock down the player so that it doesn't use the Internet for anything such as getting album art, artist information, lyrics, etc. and wouldn't want to use Baloo for indexing. I would want the player to gather all the information it needs from the files I give it on a flash drive. Can I set Elisa to do this? If so, how?

Thanks!
Don