Good choice for people to start and understand how to play Sicilian i like it very much . But e4+c4 positions you need to study this stuff learn how to use hedgehog structure against that . But this is very interesting opening for "improve" players . Easy transpositions to Najdorf/Sheveningen type structures but white of cuz has some extra options .
Sicilian Kan Variation [Free Repertoire for black]

This is a very bad article.
Not to be toxic, but I must agree. This is not a particularly good article as it doesn’t discuss many key ideas, gives virtually no theory, and bases the greatness of the Kan on obscure internet games. Also I object to 5. Bd3...g6 being critical. Everybody knows that Nf6 and Bc5 are the only two main lines against the 5.Bd3 Kan.
Sicilian Kan Variation [Free Repertoire for black]
https://www.chessonly.com/sicilian-kan-variation/