It doesn't matter if you're writing about an alien farm in Alabama or the president of a faraway planet. You'll always need to create believable characters and interactions.
The way people act, talk and show affection, can be used to create characters.
In the beginning I recommend making a sketch of the character; his/her likes and disklike, every possible thing there is to know about your character.
What’s their middle name? What’s the color of their hair/eyes? What’s their deepest fear? How do they react in tense situations? What’s their favorite smell/color/memory/movie/book/etc.?
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Writing Without Cliches
RandomIt's not enough to love our story ideas. We need to weigh their suitability as subjects for fiction, and then figure out how to go about making use of them. This means steering clear of cliché and its sappy cousin-melodrama.