Welcome to the Z. I recommend going back to the dealer and have them walk you through the functions of the radio/Uconnect, etc. Two reasons for this, 1) that USB may not be connected to the radio (it happens), 2) they are supposed to do it when you pick up the truck anyway, its part of "customer service".
We have a lot of forums for all kinds of topics, so you shouldn't have any problems finding a place to post questions.
We LOVE pics of Rams.
Here's how to post them: http://www.ramforumz.com/forumdisplay.php?f=73