help what ecs should i do to improve my "resume" (female)

im a highschool freshman residing in canada and i want to get into a t5 school in the us. my interests include math, cs, and i also play hockey. im currently in the alp program but im transferring schools next year to do ap instead.

here are some of my "acheivements" ig
- consistent honor rolls and distinction on waterloo math contests
- aime qual
- accepted to awesomemath and ross math camp
- participated in lots of other math events and contests (hmmt, arml, cubrmc) (cms, kangaroo, mathematica)
- not much for coding only ccc distinction
- won an award at a regional science fair (but i've found that i suck at presenting and researching)
- 20 volunteer hours doing random crap

what ecs should i do to improve my chances?

im thinking of going down the math olympiad route but idk if i have that in me

also ik im lacking in the leadership/volunteer aspect, especially since im gonna be transfering so leadership roles in clubs will be hard. im not sure what to do since im a huge introvert.

with the summer approaching, any suggestions or advice to improve would be appreciated!