I appreciate your initiative and encourage to have & introduce as many systems & procedures as required/possible. As a first step, presumably, if you are covered under the Standing Orders act, you should start with drafting of your own Standing Orders which inter-alia would cover most of the modules you mentioned/required. A model standing order has already featured in citeHR forum which should guide you. You are open to improve upon or modify to suit your needs.
Use this link to know more - https://www.citehr.com/444779-model-...-download.html.
All the best bro.
27th December 2018 From India, Bangalore