Undead Live Noob

[BlackBlood#IM]

I came a across Undead Live from the forums, but I'm a little unsure of how it works. It is basically a online rpg but how do I go about joining other clans or getting people to join mine? Also, does this game run in the backgrounds eating up battery? Sorry for all the questions but I never played Mafia Live and just need a brush up on the basics.