The Belgian youngster replaced Xherdan Shaqiri on Saturday to play the final 20 minutes in front of the supporters at the bet365 Stadium, having previously only featured in the final few minutes at Arsenal.
Despite the side losing 2-0 to the Championship outfit, Ngoy's substitution came amid an improved second-half display from the Potters.
Speaking after the game, the 19-year-old conveyed his delight in his performance, "I am very proud as I think I had a couple of chances.
"Now I need to keep working hard, because to one day start for the first team would be a dream."
Ngoy has recently moved from the Academy set-up to train with the senior squad, and admits he's revelled in the new opportunity to work with the first-team players and coaching staff.
"They give me a lot of advice every day," the 19-year-old added.
"I am doing what they want me to do and I keep working hard to become a proper player.
"The players have been very good with me, since the first day I trained with them and every time I train.
"They are very pleased with what I'm doing."