Closed Sicilian: Repertoire Preparation
Closed sicilian is a very easy opening to learn - we just need to know 2 games.
One is the definitive Spassky - Geller, which put ...Nf6 out of business. And the other is Spassky - Karpov Draw, that shows how both sides should play.
Note the important idea in the game 1 that a single Rook defends White's queenside while rest of the army attacks the enemy king.