Revit exercise

Hello am Ze and am working on Revit
I have small exercise that need to be done.
The requirement is to follow the way in link to create 2 simple structural buildings.
the link ( https://auburn.zoom.us/rec/share/OTJ7ij52W4gKZN9YPQ2my_vxo1zDiqInqLIFwaRndghr8g5lVkZ1oRSwoAEgbLPx.evKwEvpcfuIdSjf5)