If you don't have a Jep express pack, you can order on on-line from several companies from about $18 to $28 depending on the area coverage you want. I got one for the area I normally fly in and was able to compare it to the DOD/NOS charts where there was overlap.
Eventually, I pulled the intro section out and put it in it's own jacket to use as a study reference. A couple of hours with the intro and you'll be up to speed.
You can also download a series of articles that originally appeared in AOPA magazine on Jepp products from the Jeppesen website. Each one is a couple of pages long, and you get them in PDF format. Good gouge there.
http://www.jeppesen.com/wlcs/index.jsp?section=resources&content=publications_aopa.jsp
Good luck, there isn't that much practical difference from what you're used to. A little more info and the icons and format are different.
Just make sure you know some of the minutia such as - how is the highest obstacle on an approach plate indicated, how do you tell the diff between a manmade and natural obstacle, how are one way routes depicted on charts and how can you tell what hours they are in effect, how are MEAs, MOCAs, MRAs, etc. depicted.