Looking for guidance relating to study and application?

# 1 - Study - I know that some institutions offer tests to help you determine what you'd be good at. Do you know of any websites that offer these tests?

I'm having issues because I feel like I should go to school for something I have a passion for (veterinary medicine, anthropology, marine biology), but I'm really good at arguing (showing people different perspectives, etc...) and writing, so my mother thinks I should be a lawyer or a writer.

# 2 - Application - I also want to know what kind of jobs I can acquire by studying these things...I don't want to work in an office. I am driven and am the type of person that can make a great contribution to society...if I had proper direction.

Any information that leads to the satisfaction of my life's dreams will be rewarded will one billion dollars.