Most sacramental preparation is done at the parish level.  There are no requirements from the diocese regarding the preparation for the sacraments of First Communion and First Reconciliation beyond what is required by the parishes. The diocese does have Sacramental Preparation Guidelines for the Sacrament of Confirmation, which can be found on the Resources page of Catholic Education Ministries, https://stcdio.org/cem/cem-resources/. Parishes are expected to offer a program for sacramental preparation for Confirmation that meets these guidelines.