It’s too static, it needs more animation, usually people fidget or look around when stationary.
Imagine how hard it is to completely not move a single muscle in your body for a long time.

That’s why video game characters have a stance it makes them look less like an inanimate object.

I also know there’s no voice acting but even a little mouth movement is better than none even if it’s just muppet like flapping.

It would also be good practice to work up toward lip syncing in the future.

It may sound daunting but lip syncing is way easier than you think in fact it’s easier than regular body movement.

There are also hoards of bored voice actors on this site that would work for free as well, all you need to do is post on the forums or in the help wanted section.