The hubs are helpful, because they include training videos on specific points of emphasis for the NCAA (post play, flopping, shot clock procedures, etc.). Rules and Casebooks would be the best place to start, and are available for free online. The CCA mechanics manuals for men's and women's basketball are available through the Referee Training Center, and contain the standard mechanics expected for NCAA officials.
Men's CCA Manual
https://store.referee.com/2019-20-co...chanics-manual
Women's CCA Manual is currently unavailable.