If you want to find a career that helps people and society, I'd suggest the following:
1) Start by volunteering in your local community. 2) If you liked that, then volunteer abroad.
3) Make a list of companies / organizations that you believe help people and society in a way that you're exited about.
4) Go to their websites and look at their careers section for jobs that you might want to someday do.
5) Read the job requirements to get an idea of what degree you need or whether you need a degree. If you're really serious about preparing yourself, try contacting them to let them know that you would like to be qualified for their job after you finish your education and you would be interested in getting some advice from them on what the perfect candidate looks like.
6) If you really like the company, try to get an internship there.
If you do the above, I'm guessing that you would be able to make some pretty significant progress one month from now.
One tricky part might be step 3. A couple of principles to keep in mind: Do not limit yourself to companies that you think you qualify for. Cast a wide net. If you think that médecins sans frontières is an awesome organization but you're not a doctor, you can still work in a support role helping them make their work happen. Use the internet, Facebook, YouTube, or the TV to find out about organizations you might want to join. You could also find some magazines about the social issues you care about and see who is featured in the magazines.
Most importantly, have fun with it! Be focused! Follow a structure!