I’ve noticed a surge in news about a recent mass migration from Windows 10 (EOL) to Linux.
Welcome to the forums. That’s a solid setup you’ve built already. Fedora will definitely give you a smooth ride with secure boot and SELinux. While Arch’s flexibility is hard to let go of once you’ve tuned it to your liking.
Tumbleweed could be a good middle ground if you want rolling updates without as much manual overhead, though it’s not quite as bleeding edge as Arch. Good repo management goes a long way there. Also check out https://vanillaos.org/ and Slowroll.
Looking forward to hearing how your testing goes.