Young completed his move to United yesterday.
He said: "You get a buzz inside. You get a great feeling that one of the greatest managers in the world wants to sign you and one of the greatest clubs in the world wants to buy you.
"I am excited. It's surreal but I'm delighted to be here and I just want to get on with the job.
"As soon as I got the call I wanted to get things sorted, get the papers signed and get back into training.
"I remember when I got my first England call I thought it was a wind-up.
"I knew this one wasn't. But there's a lot of banter in the game. You can tell from the expression on my face I'm excited but I just want to get my head down now and get on with it."