There is an incredible number of openings available to the modern player. All of these many families of openings have their own distinct sets of objectives. They contain instantly recognizable positions and pawn structures that set them apart.
Your goal is to decide what kind of game you like to play. You have to figure out what positions you enjoy working in. Then it's a matter of working on your favorite openings and making them work for you.
The openings are divided into 5 volumes, basically classifying them as Kingside openings, Queenside openings and Flank Openings. Irregular Openings are another option if you want to take the road less traveled. And then you can roll the dice with gambits but we can touch on those a little later.
"Occasionally an opening is used against an opponent who is known to favor it himself. The idea is to force him to fight against his own weapons, when he will have to face not only real dangers but very often imaginary ones as well." - Tigran Petrosian