In a 2006 GM John Nunn book, in connection with opening study, it is stated that, if a "book contains illustrative games, it is worth playing these over first".
"... I feel that the main reasons to buy an opening book are to give a good overview of the opening, and to explain general plans and ideas. ..." - GM John Nunn (2006)
playing in thematic tournaments with that opening helped me learn the French fairly quickly! I do it a lot now. try it. 20 games at the same time in the same opening works for me.