If you have no internal resources to start the certification process, you should consider talking to a Management System Consultant.

A Management System Consultant can support you in setting up your management system in preparation for certification. As part of the initial process you will need to develop a management systems manual, procedures and then implement your management system. 

Management system consultancy is not a service that is provided by your Certification Body. However, DNV GL have an independent network of consultants to put you in touch with. You can select consultants based on location and experience aligned with your business and industry needs.