Shelvey's U19s debut at Gresty Road saw him cap a fine display with a well-taken free-kick.
He told liverpoolfc.tv: "It was a great performance all the way through, from the goalkeeper to the centre-forward, and to play for your country in a performance like that is good.
"Everyone has got on well since we met up. The younger lads have obviously got that winning mentality from the summer and the lads my age have got it as well. There are some good players in this squad.
"We could have scored more too. I missed a few chances myself, but I thought we opened them up quite well and our defensive shape was superb, so it was a good game for the crowd to watch."
Having already represented England at U16 and U17 level, Shelvey is aiming to one day take his international education up at least one more notch.
"It's been proved with Jack Wilshere that if you're good enough you can go into the U21s and seniors," he said.
"And that's where I'm looking to go, to keep pushing on."