Skip ahead to the 2:20 mark to see this guy's genius at work. He makes it look easy, but doubtless this guy has spent hundreds and hundreds—more likely thousands—of hours relentlessly training himself to be able to have the dexterity to play the keys this way. Combined with his great voice, it's a sight to behold.
I don't have a lot to say about this, other than the fact that if this guy can achieve his dreams, you can too. There is literally no excuse. You may be facing tough odds (I don't want to presumptuous because I don't know you), but you'd be hard-pressed to be facing tougher odds than this guy.
So next time you think you can't do something, next time you're so frustrated that you just want to quit, think about him. If you watch the video from the beginning, you'll see that he swims, puts his clothes on by himself, and brushes his own teeth. And then he goes out and sings the hell out of songs.
I don't know about you, but I feel super inspired after seeing him go!