I would definitely avoid learning to fly in headless mode. Learning to adjust controls for orientation is one of the basic skills you want to master. Start by learning to control the quad with it facing away from you all the time. Once you have a decent handle on basic moves, then turn it 45 degrees and do the same. Then 90 degrees, etc. Learn to hover, slide left and ride, forward and back, etc.
Remember that on a non-GPS quad, headless mode is always in relation to the direction the quad was facing when you turned it on and bound it. It uses that as the reference heading for directional movement in headless mode. There are some good videos on YouTube that will explain and demonstrate this.
The one good use of headless mode (other than taking selfies while flying) is using it to bring back a quad that is out of range visually and you can't tell its orientation. "Quadcopter 101" on YouTube demonstrates this technique and if you practice it, it can save a flyaway once you are flying farther out.