Hi, Payne. Welcome aboard !
Not that I can be of much help regarding the developer program, it still looks awfully complex to me 😉 .
That said your idea feels quite simple as far as I understand it. Use ePic to generate a female elf (Season 1 or 2 female elf) and use the fox from the bestiary pack. Everything else is just postwork. Cut/paste the tails where you need them, remove everything you don’t need, maybe a bit of re-coloring and voilà !
Feels like the easiest way out to me.
Of course, you can import extra fox or elf pics to make the mix more interesting but the general idea shouldn’t be much of an issue. 🙂
PS: Gimp, Paint.net or Photoshop would work fine for the post work.