"At the moment, this has been the best season I could have asked for. I have played for England and now am about to represent my club in a cup final, which is massive," the 19 year old told Arsenal TV Online.
"I am really looking forward to Sunday, it will be the biggest game of my life so far.
"If we can win, it will give us confidence for the rest of the season.
"It has been five years since Arsenal won anything and this team is too good not to win things.
"Every game brings pressure when you are at a big club like Arsenal.
"The cup final is a one-off game and anything can happen, so we have to be ready.
"We just have to play our own game, because on our day, we can beat anyone.
"Hopefully we can do it for the fans and then bring more at the end of the season."
Wilshere feels the absence of Cesc Fabregas and Theo Walcott can be used as a positive.
"Cesc is a great leader and if we win it, there will only be one person to go up and lift the trophy," he said.
"In a way we can do it for him and Theo too, he has been a massive player for us in the Carling Cup and scored two goals against Newcastle.
"We will miss them, but we need to go and do the job without them."