The 29-year-old was one of the more experienced faces in the line-up and scored as England came from a goal down to beat the Azzurri 2-1 before their 2014 World Cup qualification campaign gets underway.
And with debutants Jack Butland, John Ruddy, Ryan Bertrand, Jake Livermore and Tom Cleverley looking at home on the international stage, Jagielka is optimistic about the national team's prospects going forward.
"It's looking good," Jagielka told Sky Sports News. "The squad does look very young, it makes me feel old, but it's really good for England.
"It was a bit of a rocky start, but once we got the goal back I think we played well in the game. There were a lot of debuts tonight and a fantastic goal to win it."
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"Two goalkeepers as well, we were struggling in that department not too long ago and now we have had two good performances," he added.
"I thought John did especially well with a couple of shots in the second half and Jack has done well at the Olympics."
Jagielka played no part at Euro 2012 as John Terry and Joleon Lescott impressed at centre-back but the former Sheffield United player hopes to receive a chance to impress during the World Cup qualifying campaign.
"When you hear that the squad is going to have a few players left out of it, to give other people a game, I was desperate to get a starting role and I got that tonight," he admitted.
"It was nice to get 60-65 minutes under my belt, another cap and obviously my first international goal, which is a massive bonus and I'm looking forward to the internationals coming up."