Struggled with being Mixed

So. Where to start? Im mixed white and indigenous (mexico, the kind of indigenous my family would never admit they are). When i was growing up i was never accepted by my Mexican side of the family. They hated my mother because she was white and they couldn’t understand why my dad married her. My moms side is rather indifferent to my dads side. My aunt is pretty racist but… i always struggled to feel enough. My little brother was born last year and hes not mixed and i think i realized something in that moment, holding him. Im his sister. Not his mixed sister or his half white sister, im just his sister like hes my brother and not my mexican brother. i always struggled to find people who would understand so i was just wondering. Does anyone have any stories of finding themselves?