The 25-year-old shortstop was named World Series MVP after having 10 hits, five runs including one homer and three RBIs throughout the six games.
Pena went two-for-four with a run scored in Game 6, capping a miraculous rookie season after coming into the side to replace two-time All-Star Correa who left after last season on free agency for the Minnesota Twins.
"I'd say the hardest part was just blocking everything that's not part of the game," Pena told reporters.
"There's a saying that you can't sink a ship with water around. It sinks if water gets inside. So I just try to stay strong and keep the water outside my head.
"Just keep playing my game, show up every single day, and just trust in my preparation."
Pena's rise was also capped by becoming the first-ever rookie shortstop to win the Gold Glove.
"It has a lot to do with my family, my upbringing," Pena said about his confidence.
"Shoutout to my teammates as well. They took me in since day one. They gave me the confidence to just go out and play my game and, yeah, shoutout to them, man. This is special."