Hi! My case is approved on 4th nov from USCIS, we’ve got our case number by telephone and nt yet got welcome letter from nvc. Online it says at nvc. Can i alteady fill DS-160 form or i have to wait? Moreover my passport is going to expire in Sept 2022, i’m scared if i didnt get my interview dates untill March, it would be less than 6 months validity. Can someone suggest me if i should renew my passport now as it took 2 months to get new or i would be able to get my interview date before march? Thankyou