Sunfish aquarium

Looking for suggestions on the typeof setting for sunfish or bluegill
in an aquarium. What size/color of gravel to use and recommendations
on rocks, plants, wood. I'm looking for a natural looking setting.

I see these fish hanging out next to docks with no plants around,
swimming over rocks. I see them in the weeds. I see them hiding in old
broken ceramic pipes.

So it seems like there are a lot of options. I'd like to know what
others have done. Thanks.

Charles