Cahill, 26, joined the London club from Bolton Wanderers on Monday and is looking forward to a change in playing style.
"By joining Chelsea from Bolton I'm jumping from one scale to another scale and hopefully having fantastic players around me will make my job easier," said the England international.
"I've come from a team that is under a lot of pressure and doesn't have too much of the ball, and I'm not being disrespectful. With Chelsea you're in possession and on the front foot all the time. That will help me and you've seen that from me with England.
"It's great to be able to get on the ball and express yourself, whereas sometimes at Bolton we played a little bit more direct."
Cahill could make his debut for the Blues in their match against Norwich on Saturday.