Reincarnated Goblin Mage

Elizabeth Wade died tragically at the age of 19, only to be reincarnated in a fantasy world as a goblin mage. The upside to this: she can do magic, and it only took about a week for her to reach full maturity. Downsides: she's only 3 feet tall and has to survive in a tribal goblin village. The ????? side: goblin mages are born with both a penis and a vagina to maximize their breeding potential.

The village Elizabeth (known as Libet in this word) was born in is one of many goblin villages encroaching on the outer edges of a human empire. Libet must compete within her village for status, against the other goblin villages for resources, and against the human empire for survival. What will she accomplish in this new life?