As an individual tourist just wanting to "go sightseeing" in North Korea, you can give up all hope of getting a visa- it doesn’t happen. Your only hope is to go through a travel agent, and probably try for some sort of group visa- even a group of 2 people can be granted visas at DPRK diplomatic missions abroad. Everybody, no matter what nationality, must get a visa to enter North Korea- although citizens of South Korea or the USA aren’t normally allowed into the country, unless invited by a host organisation. Apply to the nearest North Korean embassy well in advance for a visa- processing can take a long time. Also remember that certain professions are considered `suspect’ by the authorities- such as journalism. If that’s what your passport says you are, you’d better give up the idea of visiting the country- at least in the near future.