This is such a fine line to walk, but please know that you are not the only one struggling with this. If you're just out of college, or a soon-to-be graduate, your attention naturally shifts towards sending out job applications and figuring out living arrangements if you haven't already done so. Like many students, you were probably afforded the opportunity to make an impact on your community through organizations, fraternity/sorority school chapters, and the like. However, after graduation, it might become a bit challenging to continue being apart of the same community activities that fed your devotion to serving others since much of your attention has to shift towards finding financial independence. When choosing a career path, not all paths are going to enable you to serve others in the same capacity, but don't let that deter you from those opportunities. Your goal should be to serve a PURPOSE. If a company has a vacancy that requires you to run a report, don't think for one second it doesn't serve a purpose. Yours and everyone else's roles at that company will play a key part in its success. Once you've mastered your own role,don't be shy to reach out to others and see what they do, maybe there's a process someone does that needs to be shortened or data they collect that can have more value than it already does. There is a great satisfaction in knowing that you're able to do your job while also helping others.
If you really have a deep yearning to help the community, you can always research local volunteer opportunities that you can do on the weekends or start living environmentally conscious.
Hope all this was helpful!