Basic methods are 5-card majors, 15-17 1NT, 1♦ promises 4 (4=4=3=2 opens 1♣). Essentially all 12 HCP hands are opened, opening 1 of a minor with 11 HCP would require significant shape (something like 10 cards in 2 suits).
Over 1♦, 2♣ is game-forcing, 2NT and 3♣ are natural, invitational.
Benefits include:
Plus... it's free!