There are nine, but early on you really only have access to one, The Way of White, from the fat knight right inside Firelink Shrine.
Which covenant are you in? Which do you want to join?
I am Unaffiliated at the moment, but I will be joining Chaos Servants soon. I really want Poison and Toxic Cloud (and the Pyromancies, too, I guess). I'm not playing online at the moment (my Internet sucks right now), so I'm not sure of the PvP ramifications, but we shall see whenever I get a new router.
Also, word of warning, don't go switching whichever you pick without first doing all you need to for their items, as some of them won't allow later re-joining.