Congrats on your new machine.
I upgraded my Crescendo to the Unity and it was truly just to add the embroidery (which I use so much more than I thought I ever would.)
There's not a lot to "learn" - the machine is very intuitive. If your dealer is near by, go a couple times and have the sales girls show you some things - they usually have the advanced features down pat.
Suggestions: when you set a stitch, lock it. I find when working on a big piece I've occasionally bumped the screen and changed my stitch.
Unity Suggestion - check out the snap hoop. Pricey but oh so easy to hoop versus all the screw tightening, etc. LOVE mine.