If you are looking for a guild, but not sure, you can always check out one of the many PCU guilds. Most if not all have active events nearly every day, ranging from social talks and gatherings, to quests over multiple days, to full on campaigns where up to 200 people people collectively join up to play out a massive story.
I can only speak for my guild, the Ebon Onslaught, and if you are interesting in taking on the challenge of a death knight, or a necromancer, or even an undead monster, you are welcome to come by with us for a week and see if our roleplay appeals to you!