The upon reading this and in the absence of any native examples of flying animals the pelzo decided to directly follow this grand advice. After 100 billion attempts, over a billion broken bones, and hundreds of millions of deaths the great zaxuvex finally discovered that the correct way to do so is to reach orbital velocity above the atmosphere in a space ship that provides an internal atmosphere, comfortable temperature, shielding from harmful radiation, chemical rockets to slow down, AND most importantly a heat shield and parachute for reentry. Two weeks later a vising dignitary introduced the idea for wings which was was deemed heretical and started the 42 great war.
PS: If your 'training courses' don't provide enough information to actually implement your process in the real world then it's practicably worthless.