I'm very interested in the brain/human mind, what career would be good for me?

Depends..are you into how the brain works or the human mind psychologically? You can get into biology/biochemistry/biotechnology in undergrad, and then make your way into a neuro scientist, there are many research under neuroscience at this time and in the future. You can get into medical school and become a neurologist. Or you can get into psychology and have specialty in certain cases. It'll be easier to know what career would be good for you if you have more specific and detailed interest.

Well, it's hard to be specific if you're going for an undergrad degree. Pretty much the best thing to do is to get a bachelor of science in psychology, and then go to grad school and you can specialize.

Depends on what aspect. Desecting it--probably forensic scientist or biologist. If you want to learn more about the functioning probably cognitive psychology. If you want to learn about function AND the structures of the brain along with how they work together then probably physiological psychology. All good fields.