One more tip: when I was first learning heel turns, I somehow was under the impression that I had to release my toes! When I was corrected and started keeping my feet flat on the floor, it got a heck of a lot easier. :) I've practiced them in latin heels...I don't have any harder time in them than court shoes. If anything, if latin heels are harder to do them in, it'll be that much easier when you get your court shoes!
As for the ronde, remember that ronde means "round." Start by sending your foot forward, then around. The ending really depends on what dance you're doing and what comes next, but you'll probably need to bend the knee that you're swinging around to complete it. Rondes are generally done on or close to the floor, not high up like a kick or something. Does that answer your question?