AstralLein
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Post 4 has been updated and now explains various things. If anything else is needed, I'll add it.
Ketsirai are not originally from the Emerald Isles, so they don't get any bonuses from them, yes. A dash instead of an origin.
You can. Or you can follow the origin rules of the Academy of Sela-Mira: a magical gift with one school to choose from. If the magical gift is obtained in another way, then the chosen school is enhanced by one level. I'll add this for the fox-people now.
See the end of the updated post 4 for information about the gift.