Setup of QM to DNG 703 to pull requirements into QM
One answer
Seriously:
Get in contact with IBM and make contact to the IBM IT specialists that help customers with evaluating these tools. They can manage an evaluation extension and help you understand the concepts better.
Migration is always problematic. It is just not possible for the forum to provide you with consulting that needs so much details.
ELM is pretty much agnostic of the process you want to implement. There is support for agile and other processes. SAFe, ASPICE...
There is no concept of "Getting requirements between QM and RM". What does that even mean?
You can set up provider and consumer relationships between ETM, EWM, DNG project areas, that allows you to link between the items in the different tools. E.g. a requirement implements a change request and a requirement is tested by a test case. This is described in the product documentation. It is done using a lifecycle project setup, or on the very first page of each project areas admin page directly underneath the member /administrators section.
The Money that matters example comes with example data that shows this. The linking is available in configuration aware and not configuration aware project areas. If you use configuration aware management, you need a valid global configuration to allow the linking. There are different ways of setting this up in EWM, ETM, DNG
Again, get help from IBM or their partners with expertise in the usage of this tool. That is just industry best practice.