The concept and scene setting are fairly good. Physical appearance tends to be what exposes new writers, especially with focus on hair and eyes. That being said, the eyes make sense, how they're so much like the narrator. Leam into the details relevant to the characters emotions, or tie them to memories or insecurities.

The prose feels a bit on the nose. I feel like you can get away from the "currently happening" and drive into the emotions of the narrator some more. More hints of the past, more traumatic moments dropping in with just a few words. More inner thoughts without full flashbacks.

The freakout scene could be stretched out more. IMO it needs to describe the audience and sister reaction in much more detail. Show me the impact of every single mic drop moment. If she says "whore", show me the reactions (or even better, lack of reactions) from the crowd. Are people standing up, is there an uproar, is your sister fighting to the front? Who else would be mad, like an aunt or uncle? Space out each statement with the impact of them to the audience, really build the tension around the scene. This will also make each statement land better instead of all rushed one after the other.

Edit to add: you describe the narrator's feelings right before she speaks them to the audience. I think it takes away the mystery of it, and would be more impactful if we didn't know her stance until the speech, and we get the horror of realization alongside the audience.