The maps are interactive. Each time you create or load a map, the most updated data is being loaded into the map. Try setting your map extent to a smaller geographic area. You can always zoom in and out or even hop to a specific address using the navigation tools within the map. Also, add just a few datasets to begin. Once your map opens, you can click the “Add Data” button to add additional layers.
If those changes don’t help and you think we are experiencing technical difficulties, let us know.