Obviously they're not as efficient as lithium-ion because the atom size of sodium is bigger than lithium. However lithium is scarce, sodium is everywhere. While it's not so effective for small devices, they're fine for big battery storages. If true, being able to charge in 25 minutes is great.
I see. In that case I see no reason not to use antiX. It's so lightweight it can run well on a 20 year old laptop. You don't need latest drivers to play Minecraft (you can install them if you want like on any Debian base but there is no need for that). antiX is also easy on hard drive space since it's smaller than most distros.
What use cases are you planning for it? I mean, antiX would totally rock on that machine. However having Wayland, being lightweight and easy to maintain is kinda tough to find. Lose Wayland part, it's antiX. Lose lightweight part, it's Pop OS, openSUSE Leap, etc. Lose easy to maintain part (for a newbie), it's Arch (mostly derivatives that come with a GUI installer).
Though if I was preparing that device for someone else, I would probably go with LMDE.
iTunes just doesn't work even for really old ones for just to put some music on iPod. Haven't tried with Wine 10 but I don't think that's changed. This is the only reason I keep a Windows VM with an old iTunes in it.
I assume CK2 is Crusader Kings 2? If so, it already has a Linux native build. For Guild Wars 2, you can download it from Steam and use you own credentials on the launcher and play like that. It would be easier that way.
For different distros, it doesn't actually matter that much. Just pick one you like and delve into it. You may want to change it when you learn more about Linux, but that's for some time later.
Oh, not a threat. Just a mere warning. :P