The guild I'm in, LifeAlert, is very active and newbie-friendly. Check out the application here:
http://lifealert.rlsgamer.com/viewtopic.php?f=6&t=3
If you're going to be starting a warrior, the most important thing is to have proccing weapons for aggro. If you don't have that, you're going to be pretty useless as a tank. The Polished Granite Tomahawk is an excellent low-level warrior weapon; you can buy it in East Commonlands for around 100-125pp. You can farm up that plat by selling bone chip stacks, spiderling silk stacks, and high quality bear pelts. Later on, you should get an Obsidian Shard for 400-500pp.