Unless you are interested in becoming a veterinary technician for the sake of
actually being a veterinary technician, I honestly wouldn't bother with doing a vet tech degree. Many of the prerequisites for vet school are not included in that sort of degree, and you'll have to wind up taking more undergraduate courses at the end if you want to apply for vet school. If you haven't started post-secondary education yet, you should switch your focus to looking into starting a bachelors degree at a four-year university, or at least going to a community college with the intent of transferring into one after two years.
Since you seem to be a little bit confused on the vet school preparation and admissions process, I'll just briefly detail a timeline here. The AAVMC site that twelvetigers linked, and this very forum, are both very good resources to learn more about the process, but if you don't even begin to know where to look, here's what a traditional path to vet school looks like academically (and keep in mind that you should be getting good amounts of animal related and veterinary related experience during ALL of this time, and in university you can explore things like research which hella rules):
Junior year of high school:
Look into four year universities, pick some that seem realistic to you financially that you feel like would be a good fit for both your abilities and your environmental preferences. Visit schools. Research schools. Take SAT/ACT.
Senior year of high school:
Make final list of universities, apply to universities. Declare whatever major you want, because changing it is ridiculously easy. Most pre-vet students tend to major in biology, chemistry, animal science, or related fields. Receive lots and lots of acceptances (haha) and choose the one that strikes the best balance between cost (after financial aid) and your preferences and abilities.
Freshman year at university:
Take basic sciences along with basic humanities core courses. Depending on your school's requirements you will likely need both anyhow, and vet school prerequisites include lower division classes such as a physics sequence, a chemistry sequence, a biology sequence and calc or stats. Party and drink. Or don't, if it means you'll get sucky grades like I did.
Sophomore year at university:
More of the same, except kinda start trying to figure out if you just want to major in bio or whatever or if you'd rather major in something else while taking the vet school prerequisites. Some people end up in organic chem and genetics or other upper division prerequisite classes in this year.
Junior year at university:
Start thinking about which vet schools you are going to apply to in the upcoming summer. Look at what prerequisites you've done, and try to fit in most of the ones you haven't finished yet in this year. Some schools have wonky prereqs, you're gonna wanna take a look at your target schools and make sure you don't miss out on weird stuff that you wouldn't think about (Western is notorious for this...). Take the GRE, and retake it if you think you can do significantly better.
Summer between junior and senior years at university:
Apply to vet school! Post threads here asking about every single minute detail on the application that could possibly be called into any sort of question at all.
Senior year at university:
Hang out with us here at SDN while your admissions rollercoaster saga continues! Freak out and obsess for a month about the comma you forgot to put in to the fifth sentence in your explanation statement. Keep your grades up and save up lots of money for traveling to interviews if you applied to a lot of OOS schools that have them. Stalk the mailman and refresh your email every 3 seconds. Kick butt at interviews. Post a bunch in the acceptance thread after you get your acceptances.
First year of vet school and beyond:
Freak out about loans and it actually sinking in that vet school is HARD. Work your tail off, harder than you've ever worked in your life. Have your zen moments where you're happy that you get to be doing what you want, and you know it will be worth it and blah blah sap.
Ok that's like, a novel. Wow.
And my path was more like "meander to and fro through various parts of the country while maintaining a lukewarm GPA in two different bachelors degrees and ingesting more illicit substances than you could have imagined actually existing before you actually really find yourself and then fall ass backwards into a really good graduate school situation" but you know, whichever works for you.
