Need help adding a parking lot

My work location changed to a new building and I like to use Waze when I’m driving to/from work. My main route takes me on the Interstate and it’s not uncommon for a crash to cause delays and then I’d want to know about it to seek a new route.
Anyway, it was really annoying me in the morning that Waze seems to direct me to the center of the building, so I never actually “arrive”. In the map editor, I tried selecting Place > Parking Lot and highlighting the area where the packing lot is, but even after I complete the area it just keeps giving me more pins to place. I can’t seem to actually get it to do anything.

Also… I think I am just messing it up in general. I tried following a video guide but I think it assumed you’d used the editor before.

We will help you in discord, thanks!