The first T20 match takes place in Southampton on Thursday and Maxwell believes that a much-changed side will not be thinking about the Test team's failure this summer.
"I think we are going OK," he told Sky Sports News. "I think the scoreboard probably didn't actually reflect how well we played during the Ashes series.
"The boys are all in a good mind-set, we all feel we are going quite well, the guys are in good form as far as batting.
"I think the Ashes side were a little bit hurt by what happened in the five-Test series and hopefully we can turn that around very quickly."
Australia will play two T20 Internationals and five one-day internationals against England before their tour comes to an end.