VR / Metaverse World

I am a senior BD consultant and i want to I want to start a 'metaverse' project for a big customer. It should become a very large and complex one, involving all the components of a VR multi-world, multi-user environment. Let's say a real world copy of a touristic region, with a reality and diffrent fantasy layers and each to include later a lot of applications. I know it is a very complex project but i want to understand where and how to start building it step by step. I need someone with experience and a very, very good understanding of what such a project requires, including blockchain technology, 3D streaming, etc, etc. So, at this point, a first step should be more a consulting phase where i have to make myself a "helicopter view" on the next steps human resources and timeframe. I don't have experience on programming, medium understanding on IT&C and i am senior on business development and marketing. As i said, i need somebody with a very good understanding of the "metaverse" components in general.