There are 5 different steps in configuring your account.
STEP 1 and STEP 2 are mandatory Steps.
STEP 1: You will be providing information about your primary domain and sub-domain
STEP 2: You will be verifying your primary domain.
Until your primary domain gets verified, you will not be taken to next steps.
Once you are in STEP 3, you can skip all the other steps.
Refer here on how to configure your account