Well, I think you need to go for what you want.
If your passion is becoming a veterinarian, then go for it. Just keep in mind what you are committing to. After you graduate from high school, you need to get your 4 yr degree and take all the prerequisites for vet school. It's a lot of science and math. Then, after your 4 yr degree, you have to be accepted into a vet school, and that's another 4 yrs. After that, I think you have to do an internship/residency kind of like with med school, but for animals
and that can last several years depending on what you decide to specialize in (ie. surgery, internal medicine, etc). Surgery, of course will be a longer residency...I'm not sure what they call it veterinarians, but for doctors, it's called residency. Good luck!! Are you in high school?