Hi and welcome to the forum.

One "issue" you'll find yourself up against is that most training programs for young people in France require one or more "stages" (i.e. internships) of from 3 to 6 months. These stages are often unpaid, or paid only very nominal wages, with no employer contribution for social insurances (because the students are covered through their schools or by their parents).

Obviously, the stagieres have the big advantage in the job hunt game because they cost the employer much less than a "real" employee - plus, there are certain tax benefits to the employer for taking on stagieres.

You might want to just go down to the south of France and scout out the situation in person. Most places should have their hiring done for the summer season, but there are always temp workers who get sick or get a better offer or just plain don't show up. If you're there at the right time, you could find yourself with a job.
Cheers,
Bev