It all depends on how soon you finish the process with the NVC. If you haven't already done so, you will still need to submit the "civil documents" to the NVC. If visas are available in your F4 category the NVC will schedule you for an interview.
The actual scheduling for the interview is done by the Embassy/Consulate. NVC will transfer the file there after you have paid all the required fees and provided all the requested documents, and your priority date is current.
J Charles Ferrari Eng & Nishimura 213.622.2255 The statement above is general in nature, as not all the facts are known. You should retain an attorney to review all the facts specific to your case in order to receive advise specific to your case. The statement above does not create an attorney/client relationship.