Existential Cartoons!!

Existentialism

Philosophy is a pretty hard topic. Sometimes I feel like my head gets so jumbled up with theories, it's hard to determine what I believe. I take a personal interest in Existentialism. You know, the whole idea that each individual is responsible for what they do, or in other words we have free will. I am very confused on this whole essence preceeds existence and vice-versa idea. Can someone please explain to me the difference?