The German defender made his debut against Viborg in the Europa Conference League play-off, just 24 hours after signing for the club, and has already appeared for the Hammers seven times.
He told the club's official site: “I feel like I’ve had a kick-start to my West Ham career, directly into it by playing the games straight away.
“In my opinion it’s also the best way to get to know the team, to integrate inside the club and get to know each other.
“I didn’t have so many games in pre-season so I didn’t have a rhythm, so having my debut and playing right away felt really good for me.
“I also needed a little bit of time for my body to adapt and get really fit. I feel like I’m getting there.”
He's one of eight new signings arriving at London Stadium this summer, with Kehrer adding even more depth to a stacked defensive lineup already featuring the likes of Craig Dawson and Kurt Zouma.
He added: "The new additions are exciting and interesting for everybody and for us to play our best game, it needs some time for us to find each other and know each other in the best way.
"We’re doing it in the best way possible and are working on it together with the coaching staff. I think we’re on a good way.
“I enjoy the competition. I never knew anything different – in all the teams I have ever played that has been big competition. It’s something very positive for me."