Wilson is set to make his Reds debut against the Cobblers.
"It would be fantastic to get to Wembley," said the 18-year-old. "We have just got to take it one step at a time. There are no easy ties as cup football is a one-off.
"Sometimes it's tough playing against a team from a lower league because this is their cup final and they are out to impress, and you know they will put everything into the game.
"We won't take our foot off the gas as we know complacency can sometimes kick in."
Northampton beat npower Championship side Reading on penalties in the previous round and Wilson said that showed they should not be written off before kick-off.
"That shows you they have got great character in the team to keep going right to the end and we'll have to guard against that," he added.
"For any player Anfield is a massive stage to play at no matter whether you play a League Two side or one from the Champions League.
"They will be up for it and we have to make sure we play well and win the game."