Bodybuilding, swimmingand rock climbing, or fighting? I want to get fit but not sure how.?

Well in any case I wnat to get more muscular and ripped, but what should I choose, pure strength and bulk, natural strength like rock climbing and swimming, I enjoy both, or the strength of a figther. I can't decide what I want to put my efforts into. I am nineteen so i still think there is a small margin that I could compete at a higher level. I jts don't knwo what I really want to do and what is best for me in the long run and how I can help people the most. Please help.