The Blues are trying to integrate five new players into their squad this season.
Frank Lampard's side have two wins, two draws and one win in the Premier League so far this season.
"In my role as captain, I tried to help whenever I can because we know how football works," he said. "We didn't have much time this pre-season. From my experience, I always tried to welcome them and integrate as quickly as possible.
"We have new faces from different countries and cultures. I try to mix all together and integrate and have that stability that we need. We know how the Champions League works and from the first day, we have to be ready for it.
"Since I first arrived in 2012 I always had the confidence and belief that we could fight for everything. It's true we didn't start the way we wanted to in the Premier League and the cup, but the Champions League is a completely new challenge. We have to be ready for it because we are going to play a strong team."