What to do about EC's in highschool?

Background: Male sophomore attending a STEM Academy (technically under the umbrella of the the public highschool who founded it but the culture is so different: class/teacher rigor, students and expectations and we have our own campus)

GPA: 3.7UW 4.1W
PSAT: 1180/1520
Math: 590/760
ELA: 580/760

Extracurriculars:
-Robotics Club since freshman year

Community service hours:
0

Also, can I put this on my resume: Competing at science fair since freshman year, made it to county this year and I am competing for State Science Fair, working with professionals at a local university UCR.

Please provide insight because I have realized that my extracurriculars and service hours are extremely weak and low. Also any tips/recommendations are very helpful! Thanks