As this is for a HTPC, I would rather go for uBlue Bazzite instead of Nobara. Same Fedora base, super gaming oriented too, but atomic/immutable so 0 maintenance.
Plus, uBlue projects are not distros but an alternative build pipeline system for Fedora Atomic projects. That means that the projects scope is tiny and much easier to maintain, and that the real distro maintainers are still the Fedora team. From a user perspective, it's much better in the long term than a single-person effort like Nobara.
Second for QMK. Flash any macro directly into the firmware, no proprietary software needed.