1. Book appointment, probably you will get for after approximately 20 days
2. Submit documents on appointment date in person. If documents are accepted, you will do the payment, otherwise they just ask for more documents or reject.
according to the website, it is not an official announcement, however, when I was applying for tourist visa before, they asked me 6 months even it is not mentioned on website
You should search more if someone submitted less than 6 months