I’m just thinking about starting a Nightborne Priestess for RP, here is my idea for my new char, perhaps you could start on a similar path.
Neldryss grew up in a lower middle class family in Suramar. She was not particularly talented in the arts of the arcane, but was a fast learner, and an intelligent, serious child.
As she grew up, she got a job as an office clerk through her father’s connections, compiling and editing official documents for some lower-ranking nobles.
The job was mind-numbing and monotonous, but she earned good enough arcwine rations with it for a semi-decent existence, though she knew she would be stuck with it all her life and never get the wealth, influence, and luxury of nightborne nobles.
She was a voracious reader in her free time and was fascinated with ancient history. The times when her ancestors, the night elves had the whole world not just this bubble-city. When there was a thing called “money” which could be exchanged for everything, not just the arcwine rations. When elves still ate real food, when the Sun, the Moon, and the Stars shone in the sky above, when people had faith in Elune and worshipped the Goddess.
The whole concept of religion fascinated her. Although there remained some quasi-religious traditions and holidays, and occasional expressions invoking Elune in Suramar culture, the times of attending rituals, regular prayer, and belief in the grace of Elune was long gone.
After the invasion of the Legion and the opening of the Bubble, she set out to explore the world, and soon found herself in the capital of her new allies, the Horde.
One day, while walking the streets of Orgrimmar she encountered a Goblin Priest who was enthusiastically preaching about the Light and the ancestors. The Goblin told passers-by that if you believe in the Light and devote yourself to it, remember your ancestors who dwell within the Light and make sacrifices to them, and try converting more people to the Light, the Light will reward you with happiness and prosperity in life.
Fascinated, Neldryss got a book about the Light from the Goblin and that night in her Orgrimmar dwelling she lifted a goblet of arcwine, a plate of food, and some coins to the sky and tried praying to the Light and her ancestors. She remembered her great-great-grandparents, recalled what she read about the first Bubble-dwelling Suramarians, and even tried thinking about the pre-Sundering Night elves. She had good and positive thoughts about all of these now-dead elves who now hopefully fused with and dwell within the Light after their deaths.
Then she made her deal: She will worship the Light and her ancestors, sacrifice to them, and in return they will give her money and happiness.
As she threw the food and the coins into the fireplace and poured half the glass of wine onto the floor and drank the other half, bright yellowish light enveloped her body and she started floating in the air, having visions of the goodness of the Light, seeing the ghosts of her dead relatives, and filling her with a sense of religious duties. It was one of the best experiences of her life.
As the glow faded she came down to the ground, and felt that the Light embraced her. She started her priestly studies, reading books and visiting priests of the Goblin, Blood Elf, Pandaren, and Tauren race.
She learned about how the Light and its opposite, the Shadow functions, and became a Discipline Priest.