You should schedule an appointment for your visa interview at the US Embassy or Consulate in the country where you live. Waiting times depend on the location, season, and visa category. Most visa applicants must attend an interview, with a few exceptions.
Who needs to schedule an interview:
Age 13 or younger – Interview generally not required
Age 14 to 75 – Interview required (with some exceptions for renewals)
Age 80 or older – Interview generally not required