I'm not so sure I can agree with the Supercub as a first plane either. While it has the high wing of the traditional trainer, the smaller tail surfaces and light weight will make it harder to control with anything above a light breeze while the extremely forward location of the landing gear is inviting a nose over and broken props until you learn how to land it safely. I'd go with a traditional trainer as they will be more forgiving in the wind, be it a tail dragger or tricycle geared plane.