OK, so I made a second floor, but I can't figure out how to view the first floor. All I can see is the second floor.
Also, as good as those teaching videos are, I find them really difficult to learn from. These videos are extremely tedious for a beginner. Here go to this button and then it shows this and then you go to that button and then it shows this. Well, I'm still trying to find the first button on my own software. By then the video is talking about something else. If you stop start the video, you still get lost because you have to rewind for a bit to get back to where you were. These videos are OK if you are looking for one little thing and already know a lot of the basics.