This is a widespread Jewish custom. It is done in order to start the New Year with involvement in a mitzvah
Last time I spoke to my Israeli friend when she was visiting her parents, she gave me a little virtual tour of the sukkah on Skype :D
That is correct
Sentence in english terrible
Ani matchil livnot Sukah miyad acharei Yom Kippur.
I will start building the sukkah immediately after yom kippur
If you don't know what a Sukkah is see this three min video: "Sukkot: a celebration for every nation" @ https://youtu.be/iZ8WLRNEDWg