What do i have to do to be videographer

Aside from taking production classes in high school/college - intern intern intern. Contact local companies and ask if you can shadow on a shoot - you'd want to work with Camera Ops and editors. While in college see if you can get freelance job as an assistant camera operator, production assistant, or grip. Also, look into part time jobs at a companies that works cameras or video production gear (camera rental companies etc). All of these opportunities will allow you to network with people in the industry, learn the equipment being used, and get experience.

First off being videographer is one who creates stories visually. So I would study still photography. Why still? Because in photography the principles on how a camera works is taught. Such as composition, light, exposure triangle, and more. Having a solid understanding of the basics here will help you with video. As only the composition is sometimes a little different. So many people learn video production but know nothing about shutter speeds, depth of field, or proper exposure.

Next get a camera. Any camera; and start editing stories and film together. You don't need a Red camera, your cell phone or inexpensive DSLR will work. Just concentrate getting different shots and putting stories together.
Watch how the pros do it. I encourage you to watch really good documentaries and short films. Pay attention to how the story structure is set up. How they do their shots. Light their interviews and scenes, how the pacing of editing is setup. Creative hooks used to draw you in.
I encourage you to find a mentor. Maybe you can job shadow with local news reporter. Perhaps their willing to give you pointers on your work. Don't be frustrated if your stuff isn't up to par with them. Just keep working at it. We all started from somewhere and as they say it takes 10,000 hours to master anything.
In high school, double down on creative writing. Story or anything with video starts with putting your ideas to paper, making a story board when appropriate. The better you master the English language the better you will present yourself in your work. But don't worry, most media today is very conversational in style.
Learn the craft of editing. And I don't mean the software like FCP X or Premiere. That's the prerequisite. The technology is always changing but the craft of story telling is timeless. The craft is Learning story structure and the art of pacing and b-roll. Look how people use different techniques to bring out different emotions.
Challenge yourself to make the following. And when you do write a script and story board all your shots.

A :30 (exactly :30 seconds) commercial
A :60 story about someone
A how to video that shows how to do something step by step.
A personal story or blog about yourself or something important to you.
Do a story about something with very minimal narrative or voice over. You can use an interview, but the goal is tell the story 90% with just shots about the subject and what they're about. Such as a piece on being a fireman and what they do in their training.

When telling stories don't nelglect the sound. Good audio is paramount to the viewer to have understanding. Which in your future studies study audio production as well.

A good thing to study in college is journalism and media production. Make sure you leave school knowing how to build a website because all the content is going online these days and you will be more than just a videographer. The field requires one to wear many hats.

http://velfilm.com/2012/12/18/10-things-i-learned-from-being-a-freelance-videographer/
https://www.youtube.com/watch?v=baO9OXMdOkI
https://cgi.tutsplus.com/articles/10-key-tips-to-becoming-a-successful-video-freelancer--ae-18724

There are lots of free or affordable video editing software programs out there but learning from those who have done it before can be the best way to learn, if you're not in a formal film or cinematography program. Apprenticeships with other videographers or working as a "second shooter" to a videographer or photographer and gaining valuable editing experience will help you build a great resume and portfolio to show future clients. Offering your services for free or for discounted fees to non-profits, extracurricular organizations or startups that don't have a robust marketing budget is a great way to get some experience and gain credibility before getting hired on by a larger company or starting your own video production company. Good luck!

The simple way to create a basic news story is to interview and get The Who, what, where, when, and why. Then start with a creative hook to lead off the story and lay down all your interview clips and voice overs that bridge the bites and tell the story. This basic structure of your piece is sometimes called the A-roll. Then you go back and fill the holes with b-roll video.
Then don't forget to end it. A classic way to end it is to show or make a conclusion that somehow relates to how the piece started story wise.