Thanks, I was able to do exactly what I wanted.

Arch btw: it is much stable that many Linux users think, there are a ton of guide to do/repair things thanks to Arch Wiki, and, last but not least, it has the AUR repository in which you can find basically all software you will ever need; the only malus the AUR repository has is that you have to compile every software you install with it (even if sometimes they are precompiled).

P.S. if you want a “ready-to-go” arch distro, install EndevourOs and set the btrfs file system with timeshift. Here’s a guide.

deleted by creator

I heard about LocalAI, but I never tried it.

Where can I find the steps for doing this?

I’m on Arch (btw) and the output of lsbk says

loop0         7:0    0  55,7M  1 loop /var/lib/snapd/snap/core18/2790
                                      /var/lib/snapd/snap/core18/2790
loop1         7:1    0  43,2M  1 loop /var/lib/snapd/snap/custom-screen-resolution/27
                                      /var/lib/snapd/snap/custom-screen-resolution/27
loop2         7:2    0  40,8M  1 loop /var/lib/snapd/snap/snapd/19993
                                      /var/lib/snapd/snap/snapd/19993
sda           8:0    0 447,1G  0 disk 
└─sda1        8:1    0 447,1G  0 part /run/media/joseph/6446da44-5c96-4a5b-95a7-809b5bbccf79
nvme0n1     259:0    0 953,9G  0 disk 
├─nvme0n1p1 259:1    0   260M  0 part 
├─nvme0n1p2 259:2    0    16M  0 part 
├─nvme0n1p3 259:3    0 852,6G  0 part 
├─nvme0n1p4 259:4    0  1000M  0 part 
├─nvme0n1p5 259:5    0   512M  0 part /boot/efi
├─nvme0n1p6 259:6    0     8G  0 part [SWAP]
└─nvme0n1p7 259:7    0  91,5G  0 part /var/cache
                                      /var/log
                                      /home
                                      /var/lib/snapd/snap
                                      /

N.B. sda1 is the external drive.