Welcome to DSAG, Vicki!
The learning curve for CS5 is huge, but worth it. I started out in MS DIP, but only for a very short while. I migrated to PSE. About a year later, I upgraded to CS5. I was very frustrated at first, because there are big differences. I forced myself to use CS5 ... even in a speed scrap (which was a HOOT!). It felt like it was taking me three times as long to do the simplest things. HOWEVER, it was well worth forcing the issue. I love CS5 and highly recommend that you take advantage of having it.
You can google to find some free tutorials online. I found that to be the easiest way to learn.