Personally I would need it in the US. I'm thinking about the (4) day course called "Using Teamcenter" offered by Siemens but its honestly more than I need I think.
I would contact the Nissan engineer for whom you do your work and ask them to supply you with a contact in their CAD group who is responsible for the CAD standards side of things. They should be able to point you in the right direction. There used to be a supplier website that contained some information, but if I recall correctly, it was still lacking the majority of information you'd need.
I THINK one of my former employers used the company below to submit data to Nissan and at one time I'm thinking they were helping Nissan migrate from I-DEAS to the NX series of software as well as Teamcenter. I would defintely contact them. If they are the same company I'm thiking and offer the same services, they can come to your site and show you how things are done.