2 years of internship, but no other math-sci ECs in the hs or outside? Your other activities are fine but for several reasons, they like to see stem kids also involved in hs stem activities.
First gen means your parents didn’t attend and/or graduate college.
If this question is about USC, the gpa is a bit low. Seems to put you under the mid 50%. The risk is when grades less than A are in cores, and especially the cores related to the major.
Assuming 750/750, the RW is ok, about the 75th %ile. But their mid 50 %math score for admits shows 710-790. You can see these figures on their admissions profile page or in the CDS.