"Shadowed" is a short (three-minute) horror film made with minimal elements: one actress, a couple of rooms, some shadows and a few special effects (visual and audio).
It's worth a look if you like horror films and especially if you are interested in making short films yourself.
It was made by David F. Sandberg, director of "Never Turn off the Light," and "Annabelle: Creation." He filmed it at home during the Coronavirus quarantine, with his wife, Lotta Losten, as the protagonist. Notice how much of the shock comes from simple sounds.
He used the software programs Blender, fSpy, and After Effects. Access to and experience with that kind of software may be beyond you, but even so I think this is a good example of how you can combine simple elements to good effect.
Is the ending strong enough? It's hard to comment in detail because I don't want to spoil it for you, but let's say that maybe he could have ended it with the penultimate scene--sometimes less is more (this will make sense when you've watched the film).
Also, a minor quibble: wouldn't she make more noise--whimpering, calling out, etc? My guess is he resisted that so that the film would contain only one word, but it bothered me a little while I was watching it.
Anyway, if you've been thinking about making a short film but thought it must be too complicated, let "Shadowed" inspire you to find a simple idea you can turn into an excellent short.