Air energy can be used for levitation, but that doesn't mean you can. What air does is make something lighter, but easier to move, but if you don't have the psychic powers necessary to move that something with the power of your mind, air itself won't do any good for that purpose. Besides, how light something will be, making it easier to levitate, will essentially depend on how much energy you can summon from the air, and that amount for real levitation must be immense. It's a much more complex system, and your failure to understand it shows that you can't do it.