Be brave and try the clipless! I think that falling over is a rite of passage for most, and at that, not really all that much to worry about. I still remember my first fall, mostly because I came up laughing after having toppled myself in the slowest-motion humanly possible. I don't know if any drivers at the intersection saw me, but it had to have been pretty comical. Give it a shot, they'll be far better than cages, which I think are terrifying.