I am currently an junior math and statistics student at the University of Florida. For my whole life I have really enjoyed math and really do find a calling in mathematics. Math classes are the only classes I've every really enjoyed in school. However, I also want to help people in some way or another; help those in need in America or abroad. My thoughts as current are that I can study impacts of economic or governmental policy on those in need and go out there and show those in power "this is what is happening because of insert some law/policy, here's the science to back it up, and here's what you should do to fix it".
That was just one idea that I am not particularly attached to. My problem is that I don't know what kind of jobs I could do to help people with math. I enjoy the structured, rigorous approach that mathematics has, but I want to help people in my lifetime. Much of what I learn is extremely interesting but it doesn't seem like it can help anyone, at least not for a long time.
So my questions are:
Is there a way to go to a math program and then afterwards take my knowledge and help people by developing math that is useful to people now? Do people study math at the graduate level and then NOT become pure mathematicians?
If not, then what kind of math could I study (be it statistics, applied math, bioinformatics, biostatistics, etc) to make an impact?
How do I learn about these fields/learn if I don't like them? From what I see there are only graduate courses in these specified fields, at least at UF. So I can't just take a course in it.
Does anyone know anyone who has done this/ or can give me general advice about this dilemma i'm having? I don't really know how to gather information and how to get a good feel for what I would enjoy studying. I love being in my math classes so I feel like I'll only be satisfied if I do something like that, but also aiding the world in some way.
Any advice would be of use. Thanks for your time.