Looks like a nice straightforward trip to me - decent landmarks to navigate by.
My advice to you as a newly qualified PPL is to take it slowly.
The trip you are proposing is quite straightforward, and flying out of Coventry you will be used to full ATC.
However, it is a fair distance, and it would be easy to drift off course if winds aloft don't turn out to be as forecast.
Duxford is quite close to the Stansted zone however - just be careful not to bust it.
Other than that - enjoy! The museum at Duxford is fascinating, and when I last went there I was lucky enough to see one of the resident Hurricanes in flight.
Have to say it is more ambitious than my first foray as a newbie PPL, which was from Wellesbourne to Leicester, with my wife and daughter on board.
Some people may advise you to fly solo for a while before you start taking passengers, but as long as they are properly briefed not to distract you at inappropriate times in practice it shouldn't be a problem.
Good luck and happy landings!
