What should I do to become a video editor?

Smriti, There are several careers in media (including journalism) in writing, production or post production. You can become a reporter, actor or getting behind the camera to direct, cinematograph or do finishing work as an editor, compositor or a VFX artist who can add reality to 3D vizualisations.

Smriti, Since you posted it in AVGC, I assume you want to take the technical route to enter films. This includes AV & VFX but also takes you through animated film production. This is a field where nobody cares for your qualification, they only see if you can do quality work. A good mentor and wise

Dear Smriti, You can join an editing and composting course.

It will be great if you can work under and editor has that will be better than doing a course. Also, there are many institutes that also provide courses. You can go for any course that teaches you editing instead of softtwares.