Watch Seinfeld. While some of the things are dated almost every single meme from that show has been fully integrated into american culture, so much so that its become cliche. But as a person who used to be diagnosed with Aspergers, I've had to learn all the same things you're learning now. Seinfeld is one of the best at teaching the subtleties of the culture.

See: http://tvtropes.org/pmwiki/pmwiki.php/Series/Seinfeld (warning: tvtropes link, do not click if you need to be productive)