It's not really difficult but as far as i remember, you have to configure everything yourself, which can be tiring. Depends on your mood though, if you're into configuring your own linux system, then i guess Arch is perfect for you.

I think vanilla Arch is daunting to get going because it drops you in with so little to start with. Once you're past that I think it's fine. Especially if you're already used to Debian and Fedora. Sure, you'll need to learn to use pacman (Arch's package manager) and it is a little confusing at times, but there's a ton of great advice for it online, including the Arch wiki.

I highly suggest EndeavourOS. It's basically Arch with a better install process. Once its done you'll have a desktop environment and browser. I'm using CachyOS which is similar but has a little but more stuff, but it's still Arch. Like you, I'm very confident with other Linux OSes but was wary of Arch. Turns out people have good solutions to get over that worst hurdle nowadays (the original install and getting a desktop environment).

Also, unlike other derivative distributions like Ubuntu to Debian and Manjaro to Arch, EndeavourOS really is just Arch. It's just a nicer install process.

Ime, not really. It feels daunting the first time, but the installation guide on the wiki is actually really good at holding your hand through it.

Just be careful not to skip any sections