Using a package???

Right click module -> module settings. Click Libraries tab. Click Add Jar/Directory.
Find Jar file. Press OK.

It's been two years since I used IntelliJ and I don't remember it
being this hard.

I'm trying to use an external package and having ZERO LUCK doing it?
What do I need to do to use a .jar file in my project so I can
reference the packages and classes?

Thanks,

- Rex