What To Do?

At some point in everyone's life they have to decide what they want to be doing for the rest of their life. Congratulations to me! I'm at that point. Here's my problem. I'm very interested in psychology. I want to know why people behave the way that they do. However, I enjoy (and am good at) designing and making handbags. Another problem arises when my hobby is unleashed. I also like to (and once again, am good at) writing poetry and short stories. Design comes naturally to me, so does writing...but psychology is really interesting. What should I do?