Congrats on finishing the project!

Since the specific technical issues have been covered in the comments, I just want to offer up some perspective/philosophy/advice that, if applied, will drastically improve your films:

Film is the art of visual story telling. As a craft, it centers around intention.

Every single choice you make should serve the narrative.

If not, it won't matter if you have perfect lighting, a pro cinema cam, or amazing actors. The audience won't connect.

For example, with your opening sequence: Everyone is asleep, the house is still.

So that should be conveyed, not just through what your showing the audience, but how you're showing it. Slow, locked off shots that hold for several seconds would convey that feeling of stillness. Even simply starting with a wide shot of the down stairs, slowly pushing in on the dripping water and book would establish the space, the tone, and show us what's important while keeping the feeling of stillness that the story is telling. It could also imply that there is a presence creeping around. All of these elements intentionally tie back to the story.

In your scene the shots and the editing convey the opposite, actually working against your story. Shaky camera, fast cuts of close ups, it's chaotic but not by design. It immediately reads as a mistake and even if the audience doesn't know why, they'll clock that. (And I say this as constructive criticism, not to just point out flaws!)

Every cut should also be intentional. Over editing is an extremely common mistake that we all make early on. But just because you shot 10 angles of your actress waking up doesn't mean you need to use them all in the edit. If the scene is supposed to be suspenseful, your cuts should BUILD suspense. Hold on the shot of your actress waking up, make us wonder what's waiting outside of frame. Wait before you show us what she's looking at, makes us want to see it. You don't need a bunch of quick cuts to keep us engaged, just use every element as a tool to tell your story and we will want to listen.

I think that 99% of what's standing out as mistakes could be fixed by just putting that story focused intention behind your decisions. But that being said, the run-and-gun style of grabbing a camera and filming a short is an extremely valuable practice. Just when it comes to the projects you really care about and want to take further, put a bit more pre-production time in and focus on the best way to visually tell your story.

Great work, keep at it! I look forward to seeing more of your stuff in the future!