To know where you are is to know your actual model. A previous feature of the APOC plugin, showing your meta-model as a graph is now a default feature of Neo4j and Cypher:
As it is an instant view of your schema, I advise you to save this representation of your schema:
Export both formats. You can print the PNG image to use as a basis for your new modeling, while the CSV lists all the properties.
We will now see a panorama of the types of changes that you may have to perform.