Re: how to become a vampire?
The only people who know aren't likely to tell, and that's a good thing. We don't need every other ignorant jackass being turned into a near-immortal parasitic demon of the night, human beings are quite nasty enough without an actual biological need for bloodletting. That being said, go find a Vampire if you'd like to find out how they're created, there are various explanations from the simple bite and you're in to rituals involving death and rebirth and even mystical theft of vampiric powers by individuals who subdue and capture these creatures for a living or for some personal reason. If you have any friends in the Holy C who wouldn't look down on you for requesting some odd reading, the church does allow various tomes to go out to local parish priests for study, things like exorcism diaries whose pages often contain rationally documented paranormal events (you'd be surprised how scientific a priest can sound when talking about "spiritual mechanics"), said events include encounters with beings you would no doubt consider Vampires.
Finding Vampires themselves is a hard thing, but general rules are:
1. Stick to cities, parasites are drawn towards their hosts, and the most available hosts are in urban areas. Corruption and crime also fester, homelessness, etc, lots of places for an underground culture to assert itself without being noticed or while taking the place of already existing street people.
2. Go out at night. Whether or not Vampires die in the sun is utterly unknown to me, but, by the very nature of a Vampire's existance, living off of others, drawing in the stupid and unwary for eventual submission and use, outright attacks, strong-arm intimidation tactics, lends itself to a nocturnal lifestyle.
3. Keep your eyes open. When you go looking for Vampires, you're more likely to find unfriendly people who want your money, your clothes, and probably your life too. I will never publically condone vigilante-like actions or tell anyone to do anything that might lead to harming someone else. However, you are embarking upon a very dangerous road, do be aware of that, and prepare yourself accordingly with whatever essential equipment you feel might be nessicary. Guns are bad, very bad! No!
4. Don't ask questions, don't be overt, and don't be silly. You could spend a year scoping out the same bar and find nothing, or go for a walk around the corner to grab a sandwich and nearly have your throat ripped out. The point is, once someone becomes aware you're looking for something, it becomes that much harder to find, unless you piss someone off, then you can expect a reaction from someone, probably not a Vampire though, though in the places where you'd go looking, pissing the average person off carries the same result as pissing off a vampire, minus the exsanguination, so for God sakes keep your head down!