He said: "I am playing the best I've ever played - and still improving.
"I was surprised to start against Croatia as there are so many good players. To get the nod was brilliant.
"There are so many quality players in the squad and others who were not even here."
Lennon added: "If I get picked it will be brilliant but it's early doors. We will have to see.
"But I'm feeling very confident right now."