New toon pvp advice

[darkreap]

So I'm considering trying red. I'm torn between a few classes as I will not have any gear and I'm not sure what the grouping situation will be. So far my choices are between Paladin, Ranger and Rogue. Is the paladin a viable option just for his survivability alone? Will an untwinked ranger or rogue be able to kill anyone besides other untwinked rangers and rogues (if they exist)? If I do pick these classes, what are the odds of getting a group? Should I just scrap the melee idea and play a caster so I can at least get some exp?