The pump shouldn't be loud, I'd take it back.
These bowls are designed to look pretty on a desk, but the design is actually lousy in every way for fish keeping. It is not good for communities or goldfish.
In the end you can only keep a few very small fish, but you do have a couple of options. Some guppies or a betta or small school of small tetra. A couple of ghost shrimp will go well with the guppies or tetras.