To schedule a K-1 visa interview in Ghana, you must first register on the AVITS website, complete the DS-160 form, receive your case approval from the National Visa Center (NVC), and then create an account on usvisaappt.com to pay fees and select your interview location and time. After confirmation of your payment and receipt of the email from the U.S. Embassy, you can then proceed to schedule your interview, a mandatory medical examination, and gather the necessary documents.
https://www.usvisaappt.com/visa/page?country=GH&apiPageName=visaFees&locale=en
that is all i could find as the US embassy in Ghana is less than helpful
k1 is not listed in nonimmigrant visas there and says to refer to immigrant site and the K1 is not listed there either