Giroud failed to find the target in his first start against Stoke City last weekend, a match that made it two Premier League games without a goal for the Gunners.
The French international believes that once he has adjusted he will be ready to fire Arsenal into contention this season.
He told the club's official website: "I think you need a little pressure. There can be good pressure and there can be inhibitive, bad pressure that prevents you from expressing yourself on the field.
"I am ambitious but everywhere I go I need a little adjustment time before I am completely integrated.
"That is what's happening right now at Arsenal. I'm discovering a great atmosphere and a great club so I'm very happy."
Arsenal go in search of their first win of the season at Anfield on Sunday, when they play Liverpool.