How much do colleges, specifically 7 year medical programs, care about extracurriculars?

Extracurriculars are incredibly important, for any type of program. Based on your profile, colleges like seeing students who have jobs as it shows they can handle responsibility. Also, being a part of a student-led non-profit can be a strong point as it demonstrates your drive towards participating in your community, which is just as important as good grades. If you want my advice, maybe try looking for more leadership positions. For instance, you can start your own club based on your interests that you can cater to your own schedule. You can also use your summer to build on your non-profit, create a passion project, and/or join a summer program. Colleges look at your profile as a whole, including extracurriculars, GPA, and SAT/ACT scores. If you have a high SAT score and zero notable extracurriculars, you will not be guaranteed admission. Similarly, competitive colleges want to see that you have high grades (which you do) along with extracurriculars that will make you stand out against other applicants. Since you are a sophomore, you have plenty of time to demonstrate your interests so don't worry!