Carrefour sells fresh cream, too.
Off the top of my head, I even know the basic steps:
(1) Make a pastry shell
(2) Make pastry cream (dark chocolate or coffee flavor)
(3) Make icing
(4) Put #2 inside #1
(5) Put #3 on top of #1
(6) Chill until ready to eat
I suppose one of my problems is lack of confidence in the kitchen :-(
Maybe I should force the issue?