If you ever want to start with some Italian content, or make a second route in France why not start with the (Torino-)Cuneo-Breil sur Roya-Ventimiglia/-Nice route. One of the most beautiful lines in Europe. At the moment with trains from Fossano-Cuneo-Limone Piemonte more or less every hour. A commuter function between Nice and Breil (sometimes extended in the direction of the Italian border. And some trains from Cuneo to Ventimiglia.