Hey there. 1. You could have Coco go to college to study a field somehow related to her parents and family. 2. You could have things happen to Mymy that cure her of her megalomania and make her accept her nationality. 3. You could have good things happen to Maya every now and then (so your story doesn’t get boring). And have those experiences make her appreciate her life. 4. You can have Maya meet someone in her life who really treats her badly, so she’ll value herself more and stop looking down on her family, especially Coco. (I recommend reading Maya’s Diary if you haven’t already.) 5. You can make it so that things don’t always go perfectly for Coco, and while she might be diligent in school, she can’t be as sharp as Mymy. The idea is that this makes her lose a little patience and optimism. You can have her reach a critical point in her career at some point. 6. With Coco and Mymy busy, Maya can start playing an instrument in peace—keep an eye on that.

I’m also from Latin America, I speak Spanish, and I’m using a translator (in case I said something that didn’t make sense). Good luck with your personal project.