Seriously you guys. I love tinkering. I never give up. I feel like I've failed here, having used about 4 promising tutorials found online. Just can't make it all play right.
So here's my end goal:
RAID __ (mobo has x3 M.2 slots) across x3 one TB nvme drives (I have 1 nvme drive right now, but this is good to plan for NOW)
1TB nvme drive with 3 Linux OSes:
120GB to Ubuntu Studio 22.04 Jammy LTS
120GB to Debian 12 LTS "Bookworm"
120GB to Qubes-OS
That's 360GB/1TB so far.
512GB shared btrfs encrypted Home partiton for all the OSes to use.
872GB/1TB on the nvme M.2 drive.
Finally... 128GB encrypted space for... stuff.
1TB/1TB usage on nvme M.2 drive
Hotay.
So what I run into, is a fight between Ubuntu Studio (Debian-based) and my GNU/Linux Debian OSes.
Ubuntu Studio offers to encrypt the /boot partiton in the LVM.
Debian12 shrieks this isn't possible (encrypting the /boot partiton in the LVM).
But they're both Debian-based. So there has to be common ground here.
I haven't even wrestled with Qubes-OS installation (OS #3) at this point (have used it in the past, it's delightful).
So. I'm going to wipe it all again for the umpteenth time, and I await your suggestions, pearls of wisdom, and potential "pitfalls/gotcha's" regarding my vision.
Thank you in advance, you're wonderful!
Not all heroes wear capes. But you, doubtlessly, do. Thank you. Thank you so much. This is why I went full penguin.
I WILL give Gentoo another try. She calls me. I just need to understand flags a bit more...
P.S. there was also a bloodbath regarding Grub. Neither of the two OS'es did the os-probesuccessfully, so I botched something up, there, too.