Hang gliders represent the minimal wing capable of supporting a human. But, if you want to control your flight instead of just drop in a steady glide? Then you need to increase your overall body muscle strength by a considerable factor, so you can flap those big wings. No pain, no gain. It is extremely doubtful that any human could or would tolerate the painful discomfort needed to exert the amount of muscular effort to not only glide but to climb and cruise. A pterodactyl is a rough analogue to a human size and weight, and it apparently flew. How much muscular pain are you willing to endure? On a scale of 1 to 10, about 500? I am aware that human powered sustained flight has been a historical fact for decades. My response is in terms of the apparent thread point of small and convenient wings.