Hi! I wouldn't worry. You can email them, but don't expect to get a detailed response (or any response). The consulate in Ghana did not reach out to us until they were ready for us to interview. We got notification that NVC was forwarding our case to Ghana on April 3, and we didn't hear from the US Embassy in Ghana until June 11.
This is the stage where the experiences really seem to vary by country, and unfortunately the Ghana embassy isn't too clear on the process. Have you checked your case status on NVC? Does it say "READY?"
Once it said ready, we decided to complete our DS-160, pay the visa fee, and go online to try to schedule interview dates. We did this before we got the Packet 3 (a generic letter from the embassy saying they are ready to interview you). Thankfully we got the Packet 3 on June 11, and the interview was on June 26. We took a risk in the interest of time. If you don't get that communication from the embassy before you go in for your interview, you run the risk of being turned away and having to reschedule. It's at your discretion. Feel free to PM me if you have questions or if you'd like to join our Ghana K1 WhatsApp - we have 14 members in various stages from NOA2 to married (us).
