Short Film or AudioVisual (AV) production is the process of producing moving image and sound content.
In today's multi-media world it's important to be good at using both pictures and sound to share information.
AV projects mix sounds, videos, and pictures to engage, educate, and entertain. They let people create exciting stories, share what they know, and express ideas in a way that's different from just using words.
There are many different possible projects that you could do for short film production. Examples include:
Narrative (stories)
Documentaries
Tutorials
Interviews
Whiteboard infographics
News show
Book or game reviews
Promotional videos and advertising
Vlog channel content
This great site provides good ideas and ways to approach many different types.
There are three stages of AV production: pre-production, production (also known as principal photography), and post-production.
Pre-production involves all of the planning aspects of the video production process before filming begins. This includes scriptwriting, scheduling, logistics, and other administrative duties.
Production is the phase of video production which captures the video, still images, and audio content.
Post-production is the action of selectively combining and cutting video, image, and audio clips through video editing into a finished product that tells a story or communicates a message.
Adobe provide this really good guide on video production
https://www.adobe.com/nz/creativecloud/video/discover/video-production.html
The next page will walk you through how to make your first short film.