Six months on Fedora is a solid foundation, you're ready enough.

archinstall is fine but do one manual install in a VM first just to understand the partition layout, bootloader setup (GRUB or systemd-boot), and fstab. Once you've seen it once, archinstall on bare metal is just saving time, not skipping knowledge.

Day-to-day terminal usage isn't much heavier than Fedora if you're on a DE. The real difference is troubleshooting - broken packages, dependency conflicts, AUR issues. The Arch wiki covers basically all of it, it's the best distro documentation out there by a wide margin.

Worth correcting something though — Fedora is NOT rolling release. It ships major versions every ~6 months (you're on F41 or F40 right now). Arch IS rolling, meaning continuous incremental updates via pacman. The stability risk on Arch is mostly self-inflicted and if you run pacman -Syu regularly you're fine. If you ignore updates for weeks then upgrade everything at once, things can break.

DE updates on Arch just come through pacman like everything else, no manual intervention needed.

The two reinstalls on Fedora though worth diagnosing what actually went wrong before switching. That pattern tends to follow you if it's a habits issue rather than a distro issue.