“Six California schools last year (Stanford, USC, UC Berkeley, UCLA, UCSD, UCD) and was accepted to all.”
You want to be careful about translating admissions success especially to schools like Stanford. Being the same race definitely helps but the best people to give advice would be kids from the same high school or schools in the area, since the first screen is the regional adcom. Also you learn more from the kids that didn’t get in than the ones that did.
Anyway, good luck to the OP!