What's the best way to study openings?


Openings should not be studied before the elo of 2000.
Everybody study openings but falls for simplest blunders, yes, blunder is not taking opponent's piece "en price", also. After 3 moves (6 half-moves) there are already mistakes for <1700 players. So, focus should be on everything but openings—why? Following "basic opening principles" (let the word "basic" not fool you) is far more flexible approach.