A couple other steps I had to take during setup, not sure if anyone else will need this:
During step 2, I modified the apt sources.list before entering chroot, but also ran these commands to allow for apt updates to work
Code:
$ sudo mount -o bind /proc /media/linux/proc
$ sudo mount -o bind /dev /media/linux/dev
$ sudo mount -o bind /dev/pts /media/linux/dev/pts
$ sudo mount -o bind /sys /media/linux/sys
$ sudo cp /etc/resolv.conf /media/linux/etc/resolv.conf
$ sudo chroot /media/linux
Substitute for your mount point, and maybe only the resolv.conf file is needed, but either way, it worked. I'm still working on my setup, but at least I can install packages, and it boots.