There is an excellent series on "The Basic Principles of the Closed Sicilian" (1.e4 c5 2.Nc3 followed by 3.g3) by Hungarian IM Attila Turzo at ChessLecture.com. Probably for a limited time only, you can find this series at YouTube (see above). Turzo recommends the system where you play Be3 followed typically by Qd2 and h2-h4-h5. It is a very straightforward method of play and easy to learn. His entire repertoire is quite well thought out.