Asked if he could have imagined this moment six months ago, the teenager said: "No way. I wouldn't even have thought I would even be getting mentioned to be going away with the senior squad.
"But it has happened and I enjoyed every minute of it and I will never forget the moment I came on.
"It has been an emotional week and the best week of my life. I will never forget this week."
"I am not thinking about that yet," Shaw added when asked about his World Cup chances.
"Obviously I did play a part in that game but there are important games coming up for my club.
"Hopefully if I keep putting in good performances then Roy will have a hard decision to make."
Shaw found out he would be making his debut after lunch on Wednesday, when Hodgson took him aside to tell him he would be coming on in the second half.
"As soon as I got on the pitch, all the nerves went and I enjoyed every bit of it," he told Southampton's official YouTube channel. "I just tried to focus on playing my normal game.
"I had a word with Frank Lampard before the game and he said 'I have been in this situation before, you're 18 years old, I know how you are feeling. You are going to feel nervous but make sure you enjoy every minute of it and just play how you've been playing for your club'."
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