Maybe I’ve done this a little prematurely but from what I read on the ceac website after I filled in the ds160.
I got this status on my ceac.
so I’ve gone ahead and registered and it let me book an appointment for the 30th of oct, so I’m assuming I’ll need to book the medical asap, I didn’t know I needed to wait to a date of interview, here’s what it said
Your case is ready for your interview when scheduled at the U.S. Consular section. If you have already scheduled an appointment for an interview, please prepare your documents as directed in your appointment letter and appear at the consulate on the appointed date and time. Otherwise, please wait until you have been notified of your interview appointment. Additional information about how Immigrant Visa interview appointments are scheduled can be found at: http://nvc.state.gov/interview
For more information, please visit TRAVEL.STATE.GOV.