The book that got me started was “friheden til at vælge Linux” (Freedom to choose Linux), at the time it was available in other languages, but I can only find the Danish version online:
https://linuxbog.dk/ (last updated in 2020)

When I started my LPIC I bought the “LPIC-1 in depth”., it’s a bit dry but very thorough.

https://www.openshot.org/

There are a couple of solutions, I’m using Ardour myself, but LMMS might be more like Ableton

There is a more or less complete list here: https://wiki.linuxaudio.org/apps/daw_apps

preventive bombarding

Are you calling bombing and terrorizing of Ukrainian civilians for “preventive bombarding” ?