No matter how 'amazing' he is Shenee, the point is that a horse that age has no experience, and they are known to be unreliable. With you learning to ride and him learning to carry a rider, things could easily go wrong. You could teach him bad habits and effectively ruin him. He could see something unusual and completely flip out - how would you handle that?
If you insist on riding him, get some more professional training put on him - it will benefit you as well, because he will know the right reactions to the right cues. An instructor is a must as well.