Maybe I can't get to the Eastern lands because I don't have all the expansion packs?

I dunno.

Right now, I'm swimming around the northern tip of the island, looking for any way into the island. Also trying to pick up some random dungeons but seems to be the same dungeon twice in a row? It's all a bit confusing. Also, not sure how the loot system is supposed to work. Is it every man for himself? Am I missing out because I'm hanging back? Do I need to be Mr. A-hole looter McLooty?

Everyone disappeared after we killed the boss guy the first time.. thought we had to go back to the beginning to cash in?

I dunno mang, confusing for a noob. I'm just trying to hang back, mash "T" and attack as much as I can. lol