Wow. There is a lot of work to do that my friend.
You should replicate the information from your primary (from all nodes) to your RAC DG (not necessary for all nodes), but first you'll need to configure FORCE LOGGING, Standby Redo Log files, and all other stuff. I Have a document complete explained this, but it is in portuguese :(
Are you familiar with Oracle Data Guard 11g or 10g? If not, I suggest you to read the official documentation
You can also do a "google search" to find some papers, but from experts not official documents.