Amos, who has been with United since he was 11, told the Manchester Evening News: "There is going to be something wrong with me if I wasn't a little bit nervous.
"Nerves are a good thing as long as you can control them. I didn't have a lot to do.
"I would have liked a little bit more action. I just have to hope that that is the first of many.
"Our side was pretty strong so it meant I didn't have a lot to do. It meant a lot of concentrating and organising. I have played with the players before in pre-season at Aberdeen so I had quite a good understanding with them already.
"It is great to have a little reward for all the hard work you put in every day in training.
"I just need to keep on going and keep focused and try to develop further."