I'm Me, You're You.

Emma is a guarded woman who grew up in the system, she made it out and is now living with her best friend Ruby. She works part time at a diner, but in reality she wants to be an actress. She goes to audition after audition, never giving up on her dream even though there are a few times she has tried.
Regina is a famous actress who is staring in the TV show that Emma is going to audition for. She's regal and flirty when she wants to be, and openly lesbian. Most of the world loves her, but of course there are a few haters.
Emma and Regina meet at the audition and the story goes on from there.

This is a SwanQueen FF but it's slowburn so their might be some other 'relationships' involved.
(I'm going to make it like OUAT but their names on the show will be different and it will be swanqueen eventually in the show and in their real life)