No idea what career I want to do!?

I am 19 and I can't decide what I want to do for my career.. There is like 10 things I want to do... Such as Journalism, Photography, Graphic Designer, Musician, Teacher, Magazine Editor, Interior Designer, Singer in a band, Vet, Doctor, Psycologist, Forensic Scientist. But I might as well take off vet, doctor, psycologist and forensic scientist because I suck at math and memorization and I don't want to be in school forever. I am very good at art, and I play the violin, viola, and learning guitar, piano and soon cello. I want to speak a lot of languages. I mostly want to travel the world, I don't like being in the same area for too long, and I like action. And I like helping people, one of the reasons why I want to travel the world. I have also been thinking about joining the military.. I've been told that I am strong..I can bench 130 and squatt 205 and I just started lifting weights three months ago... What are jobs I could do in the military? Or whats a career that I should I do?