for number 2. In nano, at the top of the window, type
"Hello, I am nano."
Using the menu at the bottom of the terminal for reference, type Ctrl + O (the letter, not the number) to save the file. This is the letter "O", not the number zero.
Press Enter, when prompted about the filename to write.
Then type Ctrl + X to exit nano.
Finally, type clear to clear the terminal window. The command prompt should now be at the top of the window.