Thank you for your question, my name is XXXXX XXXXX I will be happy to help you today
You have a few options available. You could do as you say, and open your SSA.gov account, and then change the address a couple of days after your account is established
Or you can call 1-800-772-1213
Further, you could take a visit to your local office as well
The internet option may be the most attractive in your situation since you are getting an account set up.
Do you have any further questions for me, or need help with the steps involved in the process?