I’ve had mixed experiences myself. Sometimes it works, sometimes it randomly breaks. I just wouldn’t recommend it to someone who wants it to “just work” and be stable and not do maintenance. For me, I’m someone who’s happy to do maintenance, but I don’t want that to extend to my graphics card, which in this day and age ought to just work.

nvidia cards are always giving people grief, especially on Wayland. Technically supported but practically not recommended if you want an easy time

I think those three will be completely fine, but also I think base Arch would be completely fine for you. I have no idea why it’s a meme that Arch is so “hard”. I wouldn’t recommend it for someone coming from Windows or Mac who has no idea what they’re doing and had no poweruser tendencies on Windows/Mac either. But for someone who’s used Linux for a few years, I think doing a base Arch install is no biggie at all. It’s got a very annoying meme reputation but I think it’s completely inaccurate.

That’s an aside, and I’m not saying you should use base Arch, just that I don’t think there’s anything wrong with it if that’s something you’re interested in. Although if you’re coming from a “beginner” distro and your intent is to learn, I do think doing a base Arch install (even if you don’t stick with it) is a good idea. You’ll be entirely capable of the install process and probably get a better understanding of how your system works. Then after you install it you can switch to some other distro you prefer.

I’ve not really tinkered with any kind of settings and just use Steam’s default which is to have a separate C: drive for every Proton game, so does that mean I’d need a separate install of a mod manager for every game? Ideally I’d like to have just one mod manager that recognises all my games (that are supported by the mod manager at least)

LeechBlock for just the browser? And yeah AppArmor for stopping programs from launching.