Please help me out with my sophomore focuses

Hello! I just started my second semester of sophomore year and I would really like advice on my extracurriculars and I know this is the time where I am expected to start taking on a more important role. I don’t want to get stuck junior year starting new things and making it seem like I’m doing it for college admissions.

I work really hard and earned a 4.78 GPA first semester.
I am doing track this year through the rest of high school and will try to win some awards there.
I am also in Science Olympiad and really enjoy science! **Any suggestions on science competitions I can enter?
I plan to work as an intern who a psychologist as this is something I am passionate about.

I am really trying to make a difference in the world, and not for college, even though I need to articulate my impacts on a resume.
I have an interview for a great Fellowship soon and if accepted, I will take on and lead my own projects!
Any suggestions on community service opportunities that you loved?*** I’m still trying to figure out something I “live for” if that makes sense. I just want to have a great time while bettering those around me.

Please excuse the grammar as I wrote this quickly haha. Thanks for reading and please reply with any help!