The French usually comes about from 1. e4 e6, 2. d4 d5, though it is reachable by transposition from other lines. It's certainly playable by black. The usual white response is: 3. e5; 3. exd5; 3. Nc3 (or Nd2). There are others, but it's helpful to be prepared for these.
The reputation it has is that positions are often closed, a bit cramped for black, and it may involve difficulty getting the queen's bishop into play. At your level, however, familiarity with it tends to frustrate the bejeebers out of white opponents who fancy themselves swashbucklers on the chessboard. Particularly frustrating to them are games which begin:
They find themselves defending the d pawn and often feeling like they have lost control of the direction of the game.
If you can play it solidly, you should score well with it. Higher rated players, of course, will have seen much of this and have their own ideas of which variations to enter and what strategies to employ. As you move up, you'll either have to deepen your understanding or find a new pet defense, but by then, you will have improved your chess.
I've been playing for 11 years (4 - 15) and my first opening was e4 followed by d3. I eventually changed my tactics from offense to defense, therefore I prefer to play as black. Is the French Defense (d4 then e3) good as a defensive opening or are there better ones i have not seen? Also, I use this opening with white as well to attack but not with as much power as some other openings