Excuse me, but first off, I would like to say that this is very possible. Bending is almost the same as kinisi of elements. Now, this is not some "would be Harry Potter" thing, and if you think it is, I'm sorry but you need to open your eyes. There is plenty of documentation, you just have to look for it. I teach this stuff and practice this stuff.
Now, no I cannot teach you, I am not currently accepting students.
If you want proof, you will have to look for it yourself.
Now, on the flipside of the coin, it will not just be easy breezy (you can't just say words and it happen, sorry to disillusion). You must first MASTER you ch/qi/ki AND your emotions OR psych.
P.S.: Sorry to Awake and Bry if I seemed a little curt.