Despite dropping down from the Premier League to the Championship, McClean is adamant that he made the right decision.
"I really do believe this is the right move for me," he told The Shields Gazette. "Obviously things had gone wrong for me at Sunderland.
"I'm fully aware that I made mistakes and, while I would also admit to losing my confidence, I certainly wasn't enjoying my football. I've already held my hand up admitting the mistakes I've made, but I also believe I've learned from those experiences, and moved on.
"The move to Wigan is the right one. The fact that Wigan won the FA Cup last season and now have the Europa League to look forward to was also a big factor for me as I want to play in Europe."
McClean could make his debut for the Latics in Sunday's Community Shield clash with Manchester United at Wembley.