I think you should call Siemens and ask for a training course of Teamcenter.
Or, have somebody assist you.
Installing Teamcenter is not "Click the install button and forget the rest".
- There are quite a few options you need to understand, select and specify.
Oracle is the underlying database ( or, one of the possible databases.)
Neither Oracle is "Click the install button and forget the rest".
Regards,
Tomas