The 26-year-old told the team's official website: "Coach Harbaugh is really intense, but he's a guy who's really smart. You want to listen to him, you want to learn from him. He's played the position. He knows what it takes to be good at the position.
"He's just a wealth of knowledge for me, especially early on trying to learn everything early on. I'm spending a lot of time with him and it's been good.
"I'm learning quick. I've always picked up things pretty quickly and I've just got to continue to work. We're only in the second week of Football School and I still have a lot to learn."
McCoy was the starting quarterback for the Browns in 2011, but lost his place to Brandon Weeden last season.