As mentioned above, unless the case has been expedited, NVC (or the consulate) will schedule the visa interview. If you did not expedite, you do NOT book the CR1/IR1 interview appointment yourself.
Your spouse beneficiary must bring the originals of all the civil documents uploaded to CEAC, plus PSA CENOMAR/CEMAR. The interview letter from NVC/USEM will have detailed instructions on what to bring to the interview.