The only places that are no-pvp (meaning its impossible to pvp) are world spawns (areas around 0,0) and small areas around graveyards.
If you want to find world pvp (and win) you should find allies. Join a town, or make townless friends. If you want to find a specific player, Rangers can Track them. If you want to get to a specific place, say to raid a town or base, Wizards or Mystics can port you to a closer location. Bards are great support if you want to run around all day.
Pvp hot spots: Warshard Boat, Bastion Roads (along the compass directions, out of spawn), Official Towns, Swamp Biomes (many people like to level in these due to higher chance of mobs not burning because of the water/trees, as well as finding slimes there)