The winger scored 18 goals in 49 appearances for The Rams last term, helping them reach the Championship play-off final at Wembley.
Wilson feels the experience of the past campaign has aided his development, meaning he began pre-season training with Liverpool on Saturday morning convinced his game has been enhanced compared to 12 months ago.
He told Liverpoolfc.com: “I feel I gained massive experience under a fantastic manager in Frank Lampard, who gave me the opportunity to go out and play week in, week out, express my ability and go out there with no fear. I felt confident throughout the season.