The United States international is currently back at the Britannia Stadium after returning early from a stint at Sky Bet Championship side Barnsley.
He did not enjoy the best of times at Oakwell, with an angry confrontation with supporters following a 5-0 defeat to Huddersfield Town leading him back to the Potters.
The 24-year-old winger, who signed for Stoke from FC Dallas in January 2013, claims he is willing to fight for a place in Mark Hughes' plans if given an opportunity to compete for a regular role.
He has, however, found first-team opportunities hard to come by and acknowledges that he may need to look elsewhere for game time if he is to take in a trip to Brazil this summer.
On the end of his stint at Barnsley and his plans for the future, Shea said in The Sentinel: "I had an altercation with a gentleman and I think the fans took it that I had a go at the club, but I was only frustrated with one guy. I'm over that and happy to be back at Stoke.
"At the time I was upset, but now I've left it behind me. I can't really change what happened.
"The passion of the fans over here is crazy, in a good way, but when things don't go their way they are upset with their players and that can get out of hand.
"I've had a lot of experiences, whether good or bad, and I've got to learn from them.
"Hopefully I can earn a spot in this team. I have to keep my head down, work hard and hope I get my chance.
"I have to show the gaffer I am good enough to play."
On the possibility of heading out on loan again, Shea added: "I need to be playing for the World Cup. I really want to go because I enjoy playing for my country."