If you want to implement an environmental management system (EMS) perhaps the following steps could be useful for an organization:
Setup a project sponsor, a project manager and a project team. Determine the scope of the EMS. Ensure top management support, get training. Designing and implementing an environmental management system (EMS) implies being knowledgeable about ISO 14001:2015.
As a first step determine environmental risks and opportunities, environmental aspects and impacts, and compliance obligations and the state of compliance.
Then, determine significant risks and opportunities and significant aspects and impacts.
Define an environmental policy and objectives. From there, it is implementation by developing action plans to improve the interaction with the environment.
Then, perform an internal audit and the management review. There you can decide if your organization is ready for a certification audit.