if i want to apply from Nigeria how can i do that

The first thing you need to do is to prepare all the documents required (including passport, passport copy, application form, recent photo, admission letter, JW 201 or 202 form, bank balance certificate, certificate of degree, and a photocopy of school transcript) and submit them to the embassy. Meanwhile, make an appointmenr for the interview. Then go to the office again on the appointed date and attend the interview. Wait for the result and collect your passport after being informed.