They're not too tough to use. There's a foot pedal that you use to start the needle moving, and then you just slide the fabric through with your hands, and the machine does all the stitching for you. You can change the speed based on how hard you push down the pedal, too, so you can start out slow if you need to.
[For some reason, she's actually kind of excited about seeing someone discover a whole new way of sewing. Now she's certain she'll want to be involved.]
I'll help you out, if you want. I'm working on a project right now, so you can just watch at first if that's easier, then I'll show you how to do it.