I think France is coming into a very golden opportunity. Anytime I am playing France and I have 5 centers going into 1902, I have a pretty solid opportunity. There are two worries that need to be addressed diplomatically. The first is the English fleet in Lon. This is never a good sign no matter how nice England talks. Sweet words can hide true intentions but builds and moves never lie. With veteran players, a move or a build that declares an attack could be something different in the hands of a newer player. For example, if Russia builds F StP south coast, it's a clear attack o Germany, however, newer players may build that way when they think "I will build there so I can support a hold on Swe". In such a case, the newer player isn't thinking about what a build or move implies because they can think about only what they want--single-minded thought.
The second thing France has to think about is the German army build. There are a limited number of uses for an army in a FG alliance, especially when that army build is in Mun.
His best bet is to review the press and unit movements and discuss his thoughts with the TA.
France has one internal issue to take care of as well: his F Mar build. Again, the uses for F Mar in a FG or EF alliance are severely limited. His TA will have more insights for this unit based on what Ogion knows about the board and other players.
The final note I would make is the fear associated with unintentional meta game. New players introduced into a game that has been going on for several years alters the game itself (newer as in time spent in the game, not skill level). New players create a sort of chaos that shapes the game. Sometimes the introduction of a new face causes others around the map to distrust the new guy because they fear a stab or they haven't laid a foundation with them. This can cause others to band together and target the new guy. Similarly, (and more often) it can cause others to trust the new player in hopes of an alliance. The new player then has the opportunity to stab an "old ally" or continue where the old France left off. This can dramatically reshape the board.
Therefore as the New France takes over, he will have to address each of these concerns in turn.