thats the very basic stuff, but if you want to learn how to make games, just look into the file gallery and search for a preinstalled game. Then goto the "make program" part again and type "LOAD"(gamename)". Goto edit mode again and look into the code, and press the HELP button to find out more about a command
Another thing, if you have questions, there are a lot of people in this community who would be happy to help you.
#1 question
He is talking about the button at the bottom right corner of the touch screen after the title screen. You can make programs there.
#2 question
That's odd. If the person who published the program no longer has it in their cloud, you won't be able to download it.