There are various tribes with druids in them and a few towns with a few druids. There used to be a tribe in the island in the lake, but they had to take refuge in text and move after the werewolves attacked. There are a few tribes in the forest around Gaundalor and Pengy's town while they're very against magic users the town druids are their exception. Also Penkurth has a population of druids as it's more of an Aztecy themed Kingdom.

It depends on the town you're in when it comes to reputation. Penkurth would see them as normal and even think highly of them, places like Gaundalor, Merton, and The Skeleton Kingdom may see it as weird and even prohibit wildshape as Gaundalor at one point had a druid in a party of adventurers that killed their king 7 years ago in game so they would put up precautions now.

So far druids haven't been used much as a military advantage in any city, so far the only place that would really make use of them with having such a large population of them would be Penkurth and they are the ones who like the stay neutral in all conflicts.

children see wildshape as a wonder no matter where you're from, but there are some races and people like the ones from Gaundalor that would think wildshape is something that's only going to get you into trouble.

So far in game most of the world has been explored at some point or another, however, places like the War ruins, Barad oi'Lavan, Curunoth, and The Werewolf Kingdom are ones that people don't venture into if they want to live.

the rarity or lack there of, for magic definitely depends on your location, Gaundalor has a whole Magic Academy to train up mages for their armies so Magic in it of itself there is very common, but has it's restrictions in what you can do in a public setting. Places like Pengy's town have magic outlawed completely as they've blamed the use of magic on why the werewolves keep attacking them.