TRY READING THROUGH POSTS!
I have linux on the eMMc not the version I want however due to the kernel , UEFI or whatever. I can install Ubuntu Mint RedHat Fedora all the modern UEFI do work.
/dev/mmcblk1p1 2048 1230847 1228800 600M EFI System
/dev/mmcblk1p2 1230848 3327999 2097152 1G Linux filesystem
/dev/mmcblk1p3 3328000 122140671 118812672 56.7G Linux filesystem
Give Qubes OS a TRY! than tell me it works
I have successfully installed from a live image UEFI distro only. I did not attempt from usb to eMMc. Qubes OS seems to be a no go on the eMMc as it is not willing to run in UEFI mode and needs to be installed under bios.
Successfully installed with boot to eMMc:
Mint UEFI from live desktop 
Fedora UEFI from live desktop “posting from unit at the moment”
Successfully installed with boot to sata SSD:
Qubes OS NON-UEFI from usb.
Qubes would install to eMMc but not be recognised at boot time.