"After that goal (vs Aston Villa) maybe I felt I made it. I was unaware about what came next," he told The Sun.
"I thought that more of the same was enough but you should always raise the bar to maintain those standards. And it was easy to grow too big for your boots for a person with my background.
"I was brought up in a way where it's impossible to stay grounded and when you're young you don't look at the bigger picture. But I should have done more.
"With hindsight, I know that if I had grafted the way I do now, I'd have had more chances. The way Mainoo is playing it looks as if he's been there for ten years.
"But what's paramount is that he keeps going. He'll get help because when you play every week people take extra care of you and they make you feel important."