Just finished this and I absolutely loved it! I especially like how honest she is about her circumstances and the way she described her youth shows a lot of self-reflection. I was very moved when she talked about her difficulties because I think my personality is similar to hers (though I loved school and I'm not as fearful of people).
This isn't an in depth look at the anime industry the way Shirabako is (though it definitely has a lot of insight in the industry just because that's the author's main work). I would say it's more about her relationship with her mother and her journey to find a place where she belongs in the world. The place just happens to be the anime industry.
I really want to watch The Anthem of the Heart now.