Start playing draft mode. It will get you used to banning champs, being able to counterpick opponents, and organizing your teams better. Blind pick is mostly people playing w/e they want with little coordination. Easy junglers are udyr, rammus, amumu, and skarner. Almost every champ can jungle, here is the current jungle tier list for the nautilus patch: http://rog.clgaming.net/tier-lists/46-jungle/latest