First off, emuMMC is "emuNAND" so its the same thing. Secondly, Nintendo Switch keys have no bearing on installing anything. Those keys are primarily meant for tasks on a computer such as Hactool. Thirdly, try using Awoo-Installer.
Sorry about the emuMMC/NAND confusion, I actually mispoke: what I meant was that in Hekate I can only launch SYS CFW, not EmuMMC CFW (in which case I get the following message: Unknown pkg1 version. Failed to launch HOS!). But SYS CFW works fine.
In any case, I also tried Awoo-Installer and let it download its own keys but after a restart installing still doesn't work (not from SD card, nor over the Internet). Awoo message: Failed to install .xci! OpenFileSystemWithId:122: Failed to open file system with id:........ Error code: 0x00234c02. I'm pretty sure the .xci files are fine as they're scene releases.