"It's my first time away from home so everything is new for me," he said, "but I have an amazing billet family and all the guys are really good. I want to be as good as I can so my goals are higher. It's not bad, but it could be better."
Canadiens director of player development Rob Ramage said Mesar's strong play during rookie camp and training camp changed his trajectory.
"He had a really good rookie tournament," Ramage said. "He stood out, he played like a pro, his habits were really, really good. And so it became a decision during [training] camp."
Montreal sent Mesar to Laval of the American Hockey League, where he played two preseason games and one regular-season game. Then the decision was made to send him to the OHL.
"He's a young guy, needs to play a lot, needs to develop his offensive game," Ramage said. "His defensive habits were really good. But the American league is a hard league to do that for a young guy. It's not real high-scoring, there's a lot of grinding.
"Kitchener is a great organization, great place to play for these young guys. And so that's how the decision was made. And he embraced it. We weren't sure. I think initially he was hoping to stick around Montreal and Laval. But once he got to Kitchener, he realized it's a special place."
Mesar made his OHL debut Oct. 21 with a goal and three assists in a 7-2 win against Sudbury, and the next night he scored two goals, his second coming in overtime, for a 4-3 victory at Guelph.