You should be in the NRA database in 4-6 weeks.
Go to the nrainstructors.org website
Click on "Click here to get started"
Click on "Click here to register now"
Enter your NRA ID, Last Name and Zip
As soon as you are in the database, you can create a login/password combo and you are officially an NRA Instructor.
Until then it will say "Invalid Details"
It will take another 2-3 weeks for the wall certificate and wallet card to arrive.