Just make a daily training program for them; this should include theory as well as practical training. Before making the training program, keep in mind the duration.
Theory Training
In the theory parts, start with the Factory Act 1948, State Shops Act, organization's standing orders, vision and mission of the organization, and history of the organization.
HR Training Components
Include the HR parts afterwards: trainings (induction and regular), attendance software (data), payrolls, policy on contractual workers. Include all of the organization's policies, evacuation procedures, welfare activities, and more.
Take a serious look at confidential data, as mentioned by Adityasoak.
Hope this will help you in a better way!