https://www.chess.com/openings
Just look through the openings on chess.com, go through a few games of each then try them out. The sicilian or Caro-Kann are probably the two best alternatives to the french for you (I really dislike e4 e5 games but that's just me). Scandinavian is playable too if you enjoy very open games.
I have played the French for some time, and not with much success, what opening should I change to if I were to reply to e4?