Some machines are bringing out a special foot like you see on the longarm machines, to use with rulers - I think Bernina is one - because then the rulers can't just slide under the needle and cause havoc. Perhaps your brand machine will have it too, sooner or later. You can get all sorts of shapes, not just straight ones.
I would strongly suggest you follow up on the class, at least it will all be explained properly. The LQS may even have a machine you can borrow for the day to try, but you may need a bit of tuition on the machine beforehand, as the teacher will not want or be able to teach you on the day.