Affiliate Marketing Secrets

I am a Sophomore in College with a Major in Legal Studies.
I have one internship under my belt (with an investment firm) and I am lining up an internship with the State Treasury and possibly a Marketing firm. I am more interested in the financial side of the Secret Service but I have also considered a job with the Financial Crimes Network or something. I have the FBI on my list but understand that is the hardest to get into. Any Secret Service agents here? Any advice in general?