You need to get a from the desk which needs to be completed in Arabic (I got a security guard to do it for me), then you have to go and get photographs taken at the shops at the back of the building, then you have to go to the driving centre and have an eye test done. Once you have that make a copy of it. Then take the whole lot back to the desk you went to for a ticket which will direct you to one of the tellers in the building. Don't forget your passport. On a visit visa you can only have a Qatarian driving licence for the length of your visa. So every time you renew your visitors visa you have to go and pay more money to extend your driving licence. I have a British licence, I don't know if there are rules for different nationalities.