Ning?

So I am having some problems figuring out ning.  I am so frustrated.  I have read all the help issues I can find and still can't completely grasp my entire head around the website.  I usually can read directions and figure stuff out by playing with it, but not this.  I don't know if I am preoccupied because school starts tomorrow and have lost my patience at the moment or what.  I had to close my computer and walk away.  I know that it is not supposed to be this difficult.  I think I am just having a brain fart at the moment......AAHH!!