Career working with animals?

The best thing to do to start a career with working with animals is to volunteer at animal shelters, zoos/aquariums, pet shops, etc. you're not "too" young to do so because i'm a sophomore in high school as well and hoping to accomplish my goal into becoming an animal trainer in the near future and i've been doing that for awhile now but you could also volunteer or be hired to become a pet sitter for family, friends, and other people who can't watch/take of their pets while their away or something or you could be fostering animals for shelters and stuff and if you have any pets; spend time with them and train them and stuff and also go to your local library or bookstore and pick up some animal books as well and even do some research on animals online that's another pretty good start.