I agree about the classes. Yes, you will go home and not know how that thing we did with the memory, changing XXXXX-what ever, but you will gain experience as to where to find the information, and how Bernina thinks when sewing. That sounds kind of odd, but how to tackle a problem. Also you should have a manual. There are exercises in the book, for the most part that is what you do in the classes. Try it, it will take you through each step. I suggest you also make a sample of your stitches some embroidery some just functional. You can write on the fabric, what thread, what foot, what settings. Often you may look at what you did on the fabric and be able to go from there.
Bernina is a great machine, but it can be intimidating. Your friend's machine will always look easier, because she knows how to run it. If she had your machine, and knew how to run it it would seem easy too.