Chance me for Brown? Will chance back!

I’m currently a junior at a rural public school. My intended major is not set in stone, but I’m thinking of cognitive science/neuroscience, and possibly sociology. I’m very new to this process, so please let me know if anything I put on here is trivial/should not go on an application! I know it’s pretty early, but I’d like to get an idea of what I need to work on. Thank you!

SAT Math: 680 (Will take again and try to raise)
SAT Writing: 730 (Will take again and try to raise)
SAT Reading: 800
Haven’t taken subject tests yet, but intend to take biology, US history, and literature

Will have taken 9 or 10 AP classes by graduation (Biology, US, Lang, Chem, Calc, Stat, French, Lit, Euro, and maybe Physics I)
AP Biology: 4 (This is the only score I have so far.)

Race: Mixed (Asian/White -
GPA: 3.9
Rank: 2 out of 160ish
Will be taking a class at either Lafayette or Lehigh next year

Extracurriculars:
Philanthropy Club/RAAB Foundation Partner (Founding member)
Key Club (Treasurer)
Scholar’s Bowl (Varsity)
Student Government (Executive President)
Madrigal Singers
School Board Student Representative
French Club
French Honor Society
National Honor Society
Odyssey of the Mind (World Finalist/State Ranatra Fusca)
Partners in Action for Community Togetherness
County Chorus
Intern at Hepatitis B research clinic

Volunteer:
(Some of the above extracurriculars are service clubs that I have done a lot with)
Cops ‘N’ Kids/Books Through Bars Book Drive Project Manager
Math Tutoring
Cops ‘N’ Kids Literacy Program
School Representative at 2015 Pennsylvania Association of Student Councils Region F Conference

Other:
Neuroscience camp at Muhlenberg College (selective and involves lab work)
Possibly attending the Pennsylvania Governor’s School for the Sciences (highly selective state-funded program)
Semester-long research project on neuroprosthetics, applied for/got grant and created human interface/neuroprosthetic simulator to go along with the project
Semester-long independent study on the Russian avant-garde movement
French III independent study
(Not sure if I should list these independent studies/the research on an application. Thoughts?)

Forgot to mention that I also volunteered as a counselor at a science camp for elementary school students.