Arduino Yun configuration for the first time

I am having Arduino Yun and trying to configure it for the first time by watching some youtube videos but on the configuration page, Iam not able to find my wifi network detected and I selected it as Europe Berlin time as i live in Aachen! Do i need to change anything in modem settings?

Be careful watching TY vids.

There is a whole section devoted to the YUN and the getting started page HERE

That is a better choice for starting out.