What should I do?

I am a 15-year old white male sophomore. I currently have a 4.0 GPA unweighted and attend a top 30 STEM high school in America. I am involved in sports and play the piano at a high-level, but have not had the time to do a lot of volunteering or clubs. My course load was as follows

Freshman Year:
Precalculus
English 1
Biology
Global Studies
Spanish 3
French 4 Honors
PE 9
Band

Sophomore Year:
AP Calculus Ab
English 2
Physics
World History
Spanish 4 Honors
Weight Training
Computer Science

I am aiming at getting into either Stanford, Berkeley, or UCLA for engineering (my dad is an engineer who went to Berkeley). What classes should I take in the future and what should I do to ensure that my dreams are realized? Any advice is appreciated. (I also got a 1280 on the SAT in 8th grade and am nearly fluent in French if that is of any help)

I think you are very strong on the academics front, but so are the next 1000 people applying, as a junior you need to find some way to make yourself stand out, do something which interests you, pick up a new instrument if that does it, or since you are very smart, you could also set up non-profit tutoring service, you pick the time when you work, you decide what subjects. just focus on what you are adding to their university because there are already 100’s of blond lacrosse captain/ student body presidents with 4.0 GPAs applying make yourself different.