To start this project, let's download data from the USGS data catalog. This project will use four US-based shapefiles—an NBA arena shapefile, a states shapefile, a congressional districts shapefile, and a counties shapefile.
The USGS has a lot of USA shapefiles for download available here: https://www.sciencebase.gov/catalog/item/503553b3e4b0d5ec45b0db20.