PvP arena is currently disabled until they make the mode more balanced with equipment into consideration.
PvP is currently not balanced and is dependent on your equipment. You can PvP by going to the arena and doing 1v1 duels, doing the PvP minigames, going into a guild-created PvP mini-game, or fighting in open world PvP maps.
You have a limit of how many PvP tokens (Valor Tokens) that you can get on each character based on your ranking. You can find
these limits under the Valor Token section
in Currencies. You WILL want to do PvP even if you don’t care about it because the Valor Tokens will be needed to buy Piercing equipment from the store.