I have taken a lot of notes over the years - and with the forced archival of the previous forum I decided to move all of it to a private domain at https://root.nix.dk - you are welcome to dig in.
I have no notes on LVM yet - mainly due to my lack of interest 
I have however found the LUKS part interesting which I have used to create a storage device for my emergency-packs.
I have also bookmarked a very good guide on doing btrfs on LUKS