Advisees
There is a huge amount of information on the internet for you to access. Here are a few web sites to look at.
Here are some places to go for information on the economics profession:
Here's some information
for econ undergraduates on job prospects. And some more at the BLS.
Here's some information on law
school rankings if you want to pursue a law degree.
Here's some information on MBA
programs
Basic information on the profession especially for post BA is at American
Economic Association
Job Opportunities for Economists lists jobs for professional economists. Most require a graduate degree in econ, finance, or statistics. There are a few that don't. This will give you a feel for what's out there if you get an advanced degree.
Here's a nice web site on grad study in economics
Some math courses that you probably want to take to prepare for grad study in economics or finance are Math 315 differential equations, Math 401, 402 Analysis. All first year courses at the grad level in econ and finance will use differential and difference equations, especially macro classes. And a course or two in Analysis will teach you how to do rigorous proofs. You should also get a copy of a good math prep book like Chiang and Wainwright's book.. (You can find used copies at Amazon or Barnes and Noble.)
Here's a ranking of econ departments that you might find interesting in choosing one for graduate study.